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Positive whole numbers are called Natural numbers. In this Java Program, we are trying to print all the natural numbers using a while loop starting from 1 to n. Here n is the endpoint decided at runtime which will be given by the user.

Steps of Program

1. We are using a ‘scanner’ to take input for the number.
2. We need to iterate from the number one by one as natural numbers are positive whole numbers. For eg .. 1,2,3,4,5,6.
3. After iterating and printing the number once we increment it by 1 and repeat the process till the while loop condition is met.

Note: Some mathematicians consider 0 as a natural number some don’t.

Java Program to print natural number from 1 to n using while loop

import java.util.*;
public class Main
{
	public static void main(String args[])
	{
		Scanner sc = new Scanner(System.in);
		System.out.println("Print Natural Numebr Program in Java:");
		System.out.println("Enter Value till the Natural numbers to be printed :");
		int n = sc.nextInt();
		int i = 1; //Natural numbers starting from 1
		System.out.println("Natural number till "+n+ " are :");
		while(i<=n) {
			System.out.println(i);
			i++;
		}
		sc.close();
	}
}

Output

Print Natural Numebr Program in Java:
Enter Value till the Natural numbers to be printed :
12
Natural number till 12 are :
1
2
3
4
5
6
7
8
9
10
11
12