Java – do-while Loop

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The Java do-while loop is used to iterate a part of the program several times. If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use do-while loop.

The Java do-while loop is executed at least once because condition is checked after loop body.

A do-while loop is the same as a while loop except that it executes the loop body

first and then checks the loop continuation condition.

Syntax:

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

flowchart of do while loop in java

Example:

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

Output:

1
2
3
4
5
6
7
8
9
10

 

Java Infinitive do-while Loop

If you pass true in the do-while loop, it will be infinitive do-while loop.

Syntax:

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

Example:

public class DoWhileExample2 {
    public static void main(String[] args) {
        do{
            System.out.println("infinitive do while loop");
        }while(true);
    }
}

Output:

infinitive do while loop
infinitive do while loop
infinitive do while loop
ctrl+c

Now, you need to press ctrl+c to exit from the program.

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