do-while loop in Java

do-while loop is executed at least once irrespective of the condition. This loop executes all the statements present in the loop body before checking the condition.

Syntax

do
{
	//code to be executed
}while(true);

Example

public class Example1
{
	public static void main(String args[])
	{
		int i=1;
		do
		{
			System.out.println(2*i);
			i++;
		}while(i<=10);
	}
}

Output

2
4
6
8
10
12
14
16
18
20

Flowchart of do-while loop

Infinite do-while loop in Java

By passing true in the do-while loop, you will get infinite do-while loop.

Syntax

do
{
	//code to executed
}while(true);

Example

public class Example
{
	public static void main(String args[])
	{
		do
		{
			System.out.println("This is infinite do while loop.");	
		}while(true);
	}
}

Output

This is infinite do while loop.
This is infinite do while loop.
This is infinite do while loop.
This is infinite do while loop.
ctrl+c

Press ctrl+c to exit infinite do-while loop.