Code Line
stringclasses 57
values | User Explanation
stringclasses 692
values | Line-Explanation in PCEX
stringclasses 131
values | Annotation Score
float64 1
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for ( int i = 0; i < arr.length; i++ ) {
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The loop starts with the iteration variable value as 0 and runs as long as the its value is less than the length of the array length, incrementing it's value by 1 each time because of i++ .
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To really change the array as we march across it, we need to use indexes so we can assign an updated value to each position as we go.
| 2 |
for ( int i = 0; i < arr.length; i++ ) {
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The loop starts with the iteration variable value as 0 and runs as long as the its value is less than the length of the array length, incrementing it's value by 1 each time because of i++ .
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We need the array indexes to start at 0 (array indexes start from 0) with every integer number up to but not including the array length.
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arr[i] += 1;
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in each iteration, the value of the array element whose index value is equal to the value of the iteration variable , is incremented by 1.
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This statement increments the element at the index i of the array by 1.
| 3 |
Scanner scan = new Scanner(System.in);
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We create a scanner object to scan inputs from user, that is , the input.
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To read the input value from the user, we need to define a Scanner object.
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Scanner scan = new Scanner(System.in);
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We create a scanner object to scan inputs from user, that is , the input.
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We need to read and process the value that the user enters.
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System.out.println("Enter an integer for seconds: ");
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We print a message to the user on screen, "Enter an integer for seconds", asking them to input the value.
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We prompt the user to enter the seconds.
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int seconds = scan.nextInt();
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we store the scanned input into an integer variable named seconds.
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We need to read the seconds that the user enters and store it in a variable.
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int seconds = scan.nextInt();
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we store the scanned input into an integer variable named seconds.
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We read the seconds by calling the nextInt() method because this input is an integer.
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scan.close();
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We then close the scan object.
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We close the scanner as we do not want to process any input from the user in the rest of the program.
| 3 |
int minutes = seconds / 60;
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We divide the seconds by 60 and store the results in another integer variable named minutes.
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To obtain the minutes in seconds, we divide the seconds by 60 because there are 60 seconds in a minute.
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int minutes = seconds / 60;
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We divide the seconds by 60 and store the results in another integer variable named minutes.
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Note that since both operands of division operator are integer, the fractional part of the result is truncated, if there is any.
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int remainingSeconds = seconds % 60;
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We then take the remainder of the division of seconds by 60 and store it into the variable named remainingSeconds .
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This is because there are 60 seconds in a minute.
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int remainingSeconds = seconds % 60;
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We then take the remainder of the division of seconds by 60 and store it into the variable named remainingSeconds .
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Note that the % operator returns the remainder of the division.
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int remainingSeconds = seconds % 60;
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We then take the remainder of the division of seconds by 60 and store it into the variable named remainingSeconds .
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To obtain the remaining seconds after taking away the minutes, we have to take the remainder of the seconds divided by 60.
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System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
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we then print to the user on screen: seconds(the value stored by this variable) + "second is" + minutes(the value stored by this variable) + "minutes and" + remainingSeconds(the value stored by this variable) + " seconds."
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This statement prints to the default standard output stream the minutes and remaining seconds from the input amount of time in seconds.
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System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
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we then print to the user on screen: seconds(the value stored by this variable) + "second is" + minutes(the value stored by this variable) + "minutes and" + remainingSeconds(the value stored by this variable) + " seconds."
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The printed text is followed by the end-of-line character at the end.
| 1 |
int num = 15;
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We initialize an integer variable named num with the value 15.
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We define variable num to store the number that we want to find its smallest divisor.
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int num = 15;
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We initialize an integer variable named num with the value 15.
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We could initialize it to any positive integer greater than 1.
| 3 |
int num = 15;
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We initialize an integer variable named num with the value 15.
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In this program, we initialize variable num to 15.
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int divisor = 2;
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we initialize another variable named divisor with the value 2.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 3 |
int divisor = 2;
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we initialize another variable named divisor with the value 2.
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We define variable divisor to store the smallest divisor of the number.
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while (num % divisor != 0) {
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We begin a while loop, with the condition that the remainder when num is divided by divisor is not equal to 0.
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Since we don't know ahead of time how many times the loop will be repeated, we need to use a while loop.
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while (num % divisor != 0) {
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We begin a while loop, with the condition that the remainder when num is divided by divisor is not equal to 0.
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We need to increment the divisor repeatedly as long as the divisor is not a factor of the number.
| 1 |
while (num % divisor != 0) {
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We begin a while loop, with the condition that the remainder when num is divided by divisor is not equal to 0.
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Therefore, we need to use a loop structure.
| 1 |
while (num % divisor != 0) {
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We begin a while loop, with the condition that the remainder when num is divided by divisor is not equal to 0.
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The condition in the while loop tests whether the body of the loop should be repeated, so it should test whether the divisor is not a factor of the number.
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while (num % divisor != 0) {
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We begin a while loop, with the condition that the remainder when num is divided by divisor is not equal to 0.
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We could check whether the divisor is not a factor of the number by computing the remainder of the division of the number by the divisor.
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while (num % divisor != 0) {
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If this holds true, then the loop will be executed.
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Since we don't know ahead of time how many times the loop will be repeated, we need to use a while loop.
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while (num % divisor != 0) {
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If this holds true, then the loop will be executed.
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We need to increment the divisor repeatedly as long as the divisor is not a factor of the number.
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while (num % divisor != 0) {
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If this holds true, then the loop will be executed.
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Therefore, we need to use a loop structure.
| 2 |
while (num % divisor != 0) {
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If this holds true, then the loop will be executed.
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The condition in the while loop tests whether the body of the loop should be repeated, so it should test whether the divisor is not a factor of the number.
| 1 |
while (num % divisor != 0) {
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If this holds true, then the loop will be executed.
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We could check whether the divisor is not a factor of the number by computing the remainder of the division of the number by the divisor.
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divisor += 1;
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If the while condition is true then the value of 1 is assigned to the divisor.
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When the divisor is not a factor of the number, we increment the variable divisor by 1.
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System.out.println("The smallest divisor of " + num + " is " + divisor);
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after exiting the loop, we print to the user on screen "The smallest divisor of " + num( the value of this variable) + "is" divisor (the value of this variable).
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This statement prints to the default standard output stream the smallest divisor of the number.
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for (int num = 2; num <= 10; num += 2) {
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It's a for loop.
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To do this, we need to use a loop structure.
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for (int num = 2; num <= 10; num += 2) {
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It's a for loop.
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We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
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for (int num = 2; num <= 10; num += 2) {
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It's a for loop.
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To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
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for (int num = 2; num <= 10; num += 2) {
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It's a for loop.
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We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 1 |
for (int num = 2; num <= 10; num += 2) {
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It's a for loop.
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Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
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for (int num = 2; num <= 10; num += 2) {
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The iteration variable num is initialized with 2.
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To do this, we need to use a loop structure.
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for (int num = 2; num <= 10; num += 2) {
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The iteration variable num is initialized with 2.
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We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
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for (int num = 2; num <= 10; num += 2) {
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The iteration variable num is initialized with 2.
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To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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The iteration variable num is initialized with 2.
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We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 1 |
for (int num = 2; num <= 10; num += 2) {
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The iteration variable num is initialized with 2.
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Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
| 3 |
for (int num = 2; num <= 10; num += 2) {
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The control condition is that if num is less than or equal to 10 , then the statement enclosed by the loop will be executed.
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To do this, we need to use a loop structure.
| 3 |
for (int num = 2; num <= 10; num += 2) {
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The control condition is that if num is less than or equal to 10 , then the statement enclosed by the loop will be executed.
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We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
| 4 |
for (int num = 2; num <= 10; num += 2) {
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The control condition is that if num is less than or equal to 10 , then the statement enclosed by the loop will be executed.
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To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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The control condition is that if num is less than or equal to 10 , then the statement enclosed by the loop will be executed.
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We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 1 |
for (int num = 2; num <= 10; num += 2) {
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The control condition is that if num is less than or equal to 10 , then the statement enclosed by the loop will be executed.
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Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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After each iteration, the iteration variable's value is incremented by 2.
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To do this, we need to use a loop structure.
| 1 |
for (int num = 2; num <= 10; num += 2) {
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After each iteration, the iteration variable's value is incremented by 2.
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We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
| 1 |
for (int num = 2; num <= 10; num += 2) {
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After each iteration, the iteration variable's value is incremented by 2.
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To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
| 4 |
for (int num = 2; num <= 10; num += 2) {
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After each iteration, the iteration variable's value is incremented by 2.
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We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 1 |
for (int num = 2; num <= 10; num += 2) {
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After each iteration, the iteration variable's value is incremented by 2.
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Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
| 1 |
System.out.println(num + " squared = " + (num * num));
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if the control condition is true, then the system prints to the user on screen num(value of this variable) +" squared= " + (num *num) (product of num with num).
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The multiplication may also be performed directly in the println statement.
| 1 |
System.out.println(num + " squared = " + (num * num));
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if the control condition is true, then the system prints to the user on screen num(value of this variable) +" squared= " + (num *num) (product of num with num).
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Note that we do not necessarily have to store the squared number in a variable.
| 1 |
System.out.println(num + " squared = " + (num * num));
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if the control condition is true, then the system prints to the user on screen num(value of this variable) +" squared= " + (num *num) (product of num with num).
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To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 2 |
System.out.println(num + " squared = " + (num * num));
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if the control condition is true, then the system prints to the user on screen num(value of this variable) +" squared= " + (num *num) (product of num with num).
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In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 2 |
Point1 point = new Point1();
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an object of the class Point1 is created, named point.
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This statement creates a Point1 object using the new keyword and empty parentheses.
| 3 |
Point1 point = new Point1();
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an object of the class Point1 is created, named point.
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The variable point holds a reference to a Point1 object.
| 1 |
point.setX(7);
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the point object's setter function/method is called. It assigns value to the point object's x coordinate.
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This statement invokes the method setX of the point to set its x-coordinate to 7.
| 3 |
point.translate(11, 6);
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The translate method of the object is called.
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This statement invokes the method translate of the point.
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point.translate(11, 6);
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The translate method of the object is called.
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The second parameter specifies how much we want to shift the y-coordinate of the point.
| 1 |
point.translate(11, 6);
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The translate method of the object is called.
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The translate method receives two parameters.
| 2 |
point.translate(11, 6);
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The translate method of the object is called.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
| 1 |
point.translate(11, 6);
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It increments the value of the x coordinate by 11 , while it increases the value of the y coordinate by 6.
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This statement invokes the method translate of the point.
| 1 |
point.translate(11, 6);
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It increments the value of the x coordinate by 11 , while it increases the value of the y coordinate by 6.
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The second parameter specifies how much we want to shift the y-coordinate of the point.
| 1 |
point.translate(11, 6);
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It increments the value of the x coordinate by 11 , while it increases the value of the y coordinate by 6.
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The translate method receives two parameters.
| 1 |
point.translate(11, 6);
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It increments the value of the x coordinate by 11 , while it increases the value of the y coordinate by 6.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This line then prints to the screen the point's coordinates.
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Note that we do not necessarily have to store the returned value from each of these methods in a variable.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This line then prints to the screen the point's coordinates.
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We could use the returned value of them directly in the println statement.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This line then prints to the screen the point's coordinates.
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This statement prints the coordinates of the point to the default standard output stream.
| 3 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This line then prints to the screen the point's coordinates.
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The printed text is followed by the end-of-line character at the end.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This line then prints to the screen the point's coordinates.
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To get the point's coordinates, we invoke the method getX and getY of the point.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This is done by calling the respective getter functions which are used to get the x and y coordinate values of the points.
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Note that we do not necessarily have to store the returned value from each of these methods in a variable.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This is done by calling the respective getter functions which are used to get the x and y coordinate values of the points.
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We could use the returned value of them directly in the println statement.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This is done by calling the respective getter functions which are used to get the x and y coordinate values of the points.
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This statement prints the coordinates of the point to the default standard output stream.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This is done by calling the respective getter functions which are used to get the x and y coordinate values of the points.
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The printed text is followed by the end-of-line character at the end.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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This is done by calling the respective getter functions which are used to get the x and y coordinate values of the points.
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To get the point's coordinates, we invoke the method getX and getY of the point.
| 3 |
class Point1 {
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It is the beginning line of the creation of a class , here, Point1
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We define the class Point1 to represent a point in the Euclidean plane.
| 3 |
public void translate(int dx, int dy) {
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this is beginning line of the translate method of the class Point1, it has two integers as its arguments, dx and dy
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This method shifts the coordinates by a specific delta-x and delta-y, which are passed as parameters.
| 3 |
public void translate(int dx, int dy) {
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this is beginning line of the translate method of the class Point1, it has two integers as its arguments, dx and dy
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We define this method as public to provide access to this method from outside of the class.
| 1 |
public void translate(int dx, int dy) {
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this is beginning line of the translate method of the class Point1, it has two integers as its arguments, dx and dy
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Also, we define its return type as void, as it does not return any value.
| 2 |
public void translate(int dx, int dy) {
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this is beginning line of the translate method of the class Point1, it has two integers as its arguments, dx and dy
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Note that both of the parameters are declared as integers because the point has integer coordinates.
| 2 |
private int y;
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it's a private variable of type int, accessible only by the getter and setter functions of the class Point1.
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Therefore, we need to declare an instance variable for the class to store the y-coordinate of the point.
| 2 |
private int y;
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it's a private variable of type int, accessible only by the getter and setter functions of the class Point1.
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We declare it as integer because we want to have integer coordinates for the point.
| 2 |
private int y;
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it's a private variable of type int, accessible only by the getter and setter functions of the class Point1.
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Note that an instance variable is a variable defined in a class, for which each instantiated object of the class has a separate copy, or instance.
| 1 |
private int y;
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it's a private variable of type int, accessible only by the getter and setter functions of the class Point1.
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Every object of the Point1 class will have its own y-coordinate.
| 2 |
x += dx;
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the x coordinate value of the class is incremented by the value of the variable dx.
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To shift the x-coordinate of the point, we need to add dx to the value of the x-coordinate of the point.
| 3 |
public void setX(int newX) {
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this is the setter method of the class, it sets the value of the x coordinate.
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Also, we define its return type as void, as it does not return any value.
| 1 |
public void setX(int newX) {
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this is the setter method of the class, it sets the value of the x coordinate.
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We define this method as public to provide access to this method from outside of the class.
| 1 |
public void setX(int newX) {
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this is the setter method of the class, it sets the value of the x coordinate.
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This method sets the current value of the x-coordinate of the point to the given value (newX) that is specified as the method's parameter.
| 2 |
public void setX(int newX) {
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this is the setter method of the class, it sets the value of the x coordinate.
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Note that the instance variable x is private; thus, it cannot be directly changed from outside the class.
| 1 |
public void setX(int newX) {
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this is the setter method of the class, it sets the value of the x coordinate.
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The parameter of the method is declared as integer because the x-coordinate of the point is an integer.
| 1 |
public void setX(int newX) {
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this is the setter method of the class, it sets the value of the x coordinate.
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It can be changed from outside the class only through this method.
| 1 |
public int getX() {
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this is the getter method of the class, it gets the value of the coordinate of the class object.
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We define this method as public to provide access to this method from outside of the class.
| 1 |
public int getX() {
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this is the getter method of the class, it gets the value of the coordinate of the class object.
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This method returns the x-coordinate of the point.
| 3 |
public int getX() {
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this is the getter method of the class, it gets the value of the coordinate of the class object.
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Note that the instance variable x is private; thus, it cannot be directly accessed from outside the class.
| 1 |
public int getX() {
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this is the getter method of the class, it gets the value of the coordinate of the class object.
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Also, we define its return type as int, as it returns the x-coordinate of the point which is an integer.
| 2 |
public int getX() {
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this is the getter method of the class, it gets the value of the coordinate of the class object.
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It can be accessed from outside the class only through this getter method.
| 2 |
String fullName = "John Smith"
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The string "John Smith" is stored in the string variable fullname.
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We define a string variable to hold the name.
| 3 |
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