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Here we have a combination of a while loop and a conditional statement.

### Java quiz 18: A while loop and conditional statements

Level: Normal

What is written to the standard output as the result of executing the following code?

public class MyClass { static boolean isActive; public static void main(String[] args) { int x = 7; int y = 1; while(!isActive) { if(x < 17) { x += 3; y += 2; if(x + y > 17) { isActive = true; } } } System.out.print(x - y); } }

###### Author: Sar Maroof

### Answer explanation

- The boolean variable isActive is not initialized. Therefore its value is false by default.
- As long as the variable isActive is false, the body of the while loop is executed.
- The statement x += 3; increments the value of x by 3. The statement y += 2; increments the value of y by 2. Therefore x = 7 + 3 = 10 and y = 1 + 2 = 3.
- The statement if(x + y > 17) returns false, because x + y = 10 + 3 = 13 and that is not greater than 17.
- For the next execution of the loop. x = 10 + 3 = 13, y = 3 + 2 = 5.So, x + y = 13 + 5 = 18 and that is greater than 17.
- For the next execution of the loop. x = 13 + 3 = 16, y = 3 + 2 = 5. x + y = 13 + 5 = 18 and that is greater than 17. Therefore the loop is executed and the staement System.out.print(x – y); writes x – y = 13 – 5 = 8 to the standard output.

The correct answer is: f.

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