//C program to demonstrate
//Sum of Natural Numbers
//using while loop

#include <stdio.h>
int main() 
{
    int i,s=0;
    int n=10;
    i=1;

    //while loop executes
    //the statements until the 
    //condition is false
    while(i<=n){

        //adding natural numbers
        //upto given number n
        s+=i;
        i++;
   }
    //printing the result
    printf("Sum= %d",s);
    return 0;
}