C program to print all natural numbers from 1 to n using While

#include<stdio.h>
int main()
{
	int n, i=1;  /* i=1 use for start with 1 to n */

	/* Input limit from User */
	printf("Enter any Number: ");
	scanf("%d",&n);

	/*  Start loop counter from 1 (i=1) and go till n (i<=n)
             increment the loop count by 1 to get the next value */
        while(i <= n)
        {
    	      printf("%d\n",i);
    	      i++;
	 }

	return 0;
}

Output

Enter any Number: 11
1
2
3
4
5
6
7
8
9
10
11