Code Line
stringclasses 57
values | User Explanation
stringclasses 692
values | Line-Explanation in PCEX
stringclasses 131
values | Annotation Score
float64 1
5
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System.out.println(num + " squared = " + (num * num));
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print square value of the num in the each iteration in the console
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In each iteration of the loop, this statement prints the square number to the default standard output stream.
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Point1 point = new Point1();
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initiate the class Point 1
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This statement creates a Point1 object using the new keyword and empty parentheses.
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Point1 point = new Point1();
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initiate the class Point 1
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The variable point holds a reference to a Point1 object.
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point.setX(7);
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call the setX method with parameter 7
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This statement invokes the method setX of the point to set its x-coordinate to 7.
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point.translate(11, 6);
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call translate method with variables 11, 6
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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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call translate method with variables 11, 6
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The second parameter specifies how much we want to shift the y-coordinate of the point.
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point.translate(11, 6);
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call translate method with variables 11, 6
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The translate method receives two parameters.
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point.translate(11, 6);
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call translate method with variables 11, 6
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The first parameter specifies how much we want to shift the x-coordinate of the point.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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print the coordinates x,y using methods getX and getY
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Note that we do not necessarily have to store the returned value from each of these methods in a variable.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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print the coordinates x,y using methods getX and getY
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We could use the returned value of them directly in the println statement.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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print the coordinates x,y using methods getX and getY
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This statement prints the coordinates of the point to the default standard output stream.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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print the coordinates x,y using methods getX and getY
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The printed text is followed by the end-of-line character at the end.
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System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
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print the coordinates x,y using methods getX and getY
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To get the point's coordinates, we invoke the method getX and getY of the point.
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class Point1 {
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class Point 1 definition start
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We define the class Point1 to represent a point in the Euclidean plane.
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private int y;
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declare the variable y
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Therefore, we need to declare an instance variable for the class to store the y-coordinate of the point.
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private int y;
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declare the variable y
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We declare it as integer because we want to have integer coordinates for the point.
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private int y;
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declare the variable y
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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.
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private int y;
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declare the variable y
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Every object of the Point1 class will have its own y-coordinate.
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public void translate(int dx, int dy) {
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translate method definition
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This method shifts the coordinates by a specific delta-x and delta-y, which are passed as parameters.
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public void translate(int dx, int dy) {
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translate method definition
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We define this method as public to provide access to this method from outside of the class.
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public void translate(int dx, int dy) {
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translate method definition
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Also, we define its return type as void, as it does not return any value.
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public void translate(int dx, int dy) {
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translate method definition
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Note that both of the parameters are declared as integers because the point has integer coordinates.
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x += dx;
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X=X+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.
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public void setX(int newX) {
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setX method definition
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Also, we define its return type as void, as it does not return any value.
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public void setX(int newX) {
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setX method definition
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We define this method as public to provide access to this method from outside of the class.
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public void setX(int newX) {
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setX method definition
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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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setX method definition
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Note that the instance variable x is private; thus, it cannot be directly changed from outside the class.
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public void setX(int newX) {
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setX method definition
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The parameter of the method is declared as integer because the x-coordinate of the point is an integer.
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public void setX(int newX) {
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setX method definition
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It can be changed from outside the class only through this method.
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public int getX() {
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getX method definition
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We define this method as public to provide access to this method from outside of the class.
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public int getX() {
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getX method definition
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This method returns the x-coordinate of the point.
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public int getX() {
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getX method definition
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Note that the instance variable x is private; thus, it cannot be directly accessed from outside the class.
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public int getX() {
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getX method definition
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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.
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public int getX() {
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getX method definition
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It can be accessed from outside the class only through this getter method.
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for (int num = 2; num <= 10; num += 2) {
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line 3 starts the "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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line 3 starts the "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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line 3 starts the "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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line 3 starts the "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.
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for (int num = 2; num <= 10; num += 2) {
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line 3 starts the "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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As the goal states we have to obtain the square of every even number that is lower than 10, the loop starts with 2.
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To do this, we need to use a loop structure.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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As the goal states we have to obtain the square of every even number that is lower than 10, the loop starts 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.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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As the goal states we have to obtain the square of every even number that is lower than 10, the loop starts 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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As the goal states we have to obtain the square of every even number that is lower than 10, the loop starts 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.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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As the goal states we have to obtain the square of every even number that is lower than 10, the loop starts 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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it is incremented by 2 every time, so we get the next even number.
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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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it is incremented by 2 every time, so we get the next even number.
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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.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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it is incremented by 2 every time, so we get the next even number.
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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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it is incremented by 2 every time, so we get the next even number.
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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 is incremented by 2 every time, so we get the next even number.
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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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Num<= 10 condition is to get numbers that are lesser than or equal to 10.
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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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Num<= 10 condition is to get numbers that are lesser than or equal to 10.
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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.
| 2 |
for (int num = 2; num <= 10; num += 2) {
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Num<= 10 condition is to get numbers that are lesser than or equal to 10.
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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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Num<= 10 condition is to get numbers that are lesser than or equal to 10.
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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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Num<= 10 condition is to get numbers that are lesser than or equal to 10.
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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 |
System.out.println(num + " squared = " + (num * num));
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line 4 is just to print the output.
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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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line 4 is just to print the output.
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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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line 4 is just to print the output.
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To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 1 |
System.out.println(num + " squared = " + (num * num));
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line 4 is just to print the output.
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In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 1 |
System.out.println(num + " squared = " + (num * num));
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Every-time the next even number will taken, it will printed and the with the formula of "num*num" its square will be obtained and printed.
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The multiplication may also be performed directly in the println statement.
| 2 |
System.out.println(num + " squared = " + (num * num));
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Every-time the next even number will taken, it will printed and the with the formula of "num*num" its square will be obtained and printed.
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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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Every-time the next even number will taken, it will printed and the with the formula of "num*num" its square will be obtained and printed.
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To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 3 |
System.out.println(num + " squared = " + (num * num));
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Every-time the next even number will taken, it will printed and the with the formula of "num*num" its square will be obtained and printed.
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In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 3 |
Point1 point = new Point1();
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Line 3 is just a declaration of a new object of type "Point1".
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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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Line 3 is just a declaration of a new object of type "Point1".
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The variable point holds a reference to a Point1 object.
| 2 |
point.setX(7);
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By using the function setX, the value 7 is passed to the object.
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This statement invokes the method setX of the point to set its x-coordinate to 7.
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point.setX(7);
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It will be an x-coordinate.
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This statement invokes the method setX of the point to set its x-coordinate to 7.
| 1 |
point.translate(11, 6);
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With the function "translate", the x and y co-ordinates of the point will be moved to 11 and 6 respectively.
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This statement invokes the method translate of the point.
| 3 |
point.translate(11, 6);
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With the function "translate", the x and y co-ordinates of the point will be moved to 11 and 6 respectively.
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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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With the function "translate", the x and y co-ordinates of the point will be moved to 11 and 6 respectively.
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The first parameter specifies how much we want to shift the x-coordinate of the point.
| 2 |
point.translate(11, 6);
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With the function "translate", the x and y co-ordinates of the point will be moved to 11 and 6 respectively.
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The translate method receives two parameters.
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