While Loops in Java

While loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. The while loop can be thought of as a repeating if statement.

Syntax:

while (condition) 
{
 
  // code block to be executed
 
}

Flow Chart

How does a While loop executes?

Control falls into the while loop.
Jumps to Condition
Condition is tested.
- a) If Condition yields true, the flow goes into the Body.
- b) If Condition yields false, the flow goes outside the loop
The statements inside the body of the loop get executed.
Updation takes place.
Control flows back to Step 2.
The do-while loop has ended and the flow has gone outside.

Example1: Table Print

public class WhileEx {  
public static void main(String[] args) {  
    int i=1;  
    while(i<=5){  
        System.out.println(i);  
    i++;  
    }  
}  
}  

Output

Example2: Java Program to Print Multiplication Table using While Loop

import java.util.Scanner;

 public class MultiplicationTables 
{
   public static void main(String[] args) 
   {
      System.out.println("Enter an integer Number to print tables : ");
      Scanner sc = new Scanner(System.in);
      int number = sc.nextInt();
      System.out.println("Table of " + number + " is : ");
      int a = 1;
      while(a <= 10)
      {
         System.out.printf("%d * %d = %d \n", number, a, number * a);
         a++;
      }
      sc.close();
   }
}

Output

Multiplication Table using While Loop in java

Next TopicDo-while Loop in Java

← prev next →

Java Tutorials

Control Statements

While Loops in Java

How does a While loop executes?