Java Quizzes Green = Easy, Blue = Normal, Red = Hard Q01 Q02 Q03 Q04 Q05 Q06 Q07 Q08 Q09 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 Q25 Q26 Q27 Q28 By title |

The while loop is one of the types of loops in Java. Every advanced Java programmer see what happens in this program, but unfortunately that doesn’t apply to beginners. Therefore, as a beginner programmer, you need to practice regularly to master that kind of loops.

### Java quiz 11: Practicing with while loop

Level: Easy

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

public class WhileLoop { public static void main(String[] args) { int i = 1; while (i < 9) { i += 2; System.out.print(i); } } }

###### Author: Sar Maroof

### Answer explanation

- The statement while (i < 9) means that execute the body of the loop as long as the variable i is smaller than 9.
- The initial value of i is equal to 1 and that is smaller than 9. Therefore the body of the loop is executed.
- The statement i += 2; increments the value of i by 2. So, i = 1 + 2 = 3. The statement System.out.print(i); writes
**3**to the standard outpu. - The value of i is now 3 and that is smaller than 9. Therefore the body of the loop is executed. The statement i += 2; increments the value of i by 2. So, i = 3 + 2 = 5 and
**5**is written to the standard output. - The value of i is now 5 and that is smaller than 9. Therefore the body of the loop is executed. The statement i += 2; increments the value of i by 2. So, i = 5 + 2 = 5 and
**7**is written to the standard output. - The value of i is now 7 and that is smaller than 9. Therefore the body of the loop is executed. The statement i += 2; increments the value of i by 2. So, i = 7 + 2 = 9 and
**9**is written to the standard output. - The value of i is now 9, but 9 is not smaller than 9 that is why the loop is terminated and the program writes 3579 to the standard output.

The correct answer is: a.

If you found this difficult, you might consider reading my book Java quizmaster for beginners. It is easy to understand, organized to learn Java in 17 days and it guides you to master Java code by solving 105 quizzes and 117 assignments. This book explains each chapter properly before starting with exercises and assignments. It is available on Amazon. See inside the book here!

Please, leave your questions, feedback and suggestions in the comments below!

SarMaroof.com offers a practical method to learn and improve your Java skills. It avoids unnecessary long boring theoretical explanations, but it uses many exercises and quizzes.

## Suggested Articles

## Books by Sar Maroof |

Subscribe to Sar Maroof's RSS feeds! Mail this page to a friend! Bookmark this page! |