Program to calculate the sum of the first n natural numbers using do-while loop

 Program to calculate the sum of the first n natural

numbers using do-while loop 

#include<stdio.h>

void main()

{

int i=1, n, sum=0;

printf(“Enter the value of n\n”);

scanf(“%d”,&n);

do

{

sum=sum+i;

i++;

} while(i<=n);

printf(“Sum is %d\n”,sum);

}