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Java Do-While Loop

A do-while loop is similar to a while loop, except that a do-while loop is guaranteed to execute at least one time. The difference between do-while and while loop is that do-while evaluates its condition at the bottom of the loop instead of the top. Therefore, the statements within the do block are always executed at least once. Here is the syntax to write do-while loop:

do {
} while (expression);

The do-while statement evaluates expression, which must return a boolean value. If the expression is true, the flow of control goes back to the do, and the statements within the loop executes again. This process repeats until the expression returns false.

Here is a simple do-while example:

package com.java2novice.loops;

public class SimpleDoWhileEx {

	public static void main(String a[]){
		int i = 0;
		do {
			System.out.print(i+" ");
		} while(i<10);

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Java Loop Examples

  1. Java While Loop
  2. Java Do-While Loop
  3. Java For Loop
  4. Java For each Loop
  5. break statement in java
  6. continue statement in java
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Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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