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Java program to print numbers from 1 to N using while loop

This is an Example of java while loop - In this java program, we are going to print numbers from 1 to N using while loop.
Submitted by Chandra Shekhar, on March 09, 2018

To print numbers from 1 to N, we need to read the value of N by the user and then run a loop (we are using while loop here), logic to print numbers:

  • First, we are creating an object named scanner of Scanner class to read the input.
  • Declared a variable named n to store the value, given by the user, to read the input – we are using scanner.nextInt() – Here, nextInt() is the method of Scanner class, that will read an integer value.
  • Then, we are initializing loop counter (i) by 1 and checking condition within while till less than or equal to N and printing the numbers.

Example:

    Input:
    Enter the value of N: 15
    Numbers from 1 to 15
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15

Program to print the number from 1 to N using while loop in java

import java.util.Scanner;

public class Print_1_To_N_UsingWhile 
{
	public static void main(String[] args)
	{
		//loop counter initialisation
		int i =1;

		//create object of scanner class
		Scanner Sc = new Scanner(System.in);

		// enter the value of " n "
		System.out.print("Enter the value n : ");

		// read the value.
		int n = Sc.nextInt();

		System.out.println("Numbers are : ");

		while(i<=n)
		{
			System.out.println(i);
			i++;
		}
	}
}

Output

Enter the value n : 15
Numbers are : 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15






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