# C Program to calculate sum of First N Natural numbers

Get input n and calculate the sum of first n natural numbers.

Sample Input 1:

5

Sample Output 1:

15(1+2+3+4+5)

#### Program or Solution

#include<stdio.h> int main() { int n,i,sum=0; printf("Enter a number:"); scanf("%d",&n); for(i=1;i<=n;i++) { sum=sum+i; } printf("The sum of natural numbers till %d is : %d",n,sum); return 0; }

#### Program Explanation

Instruction(s) inside the for block{} are executed repeatedly till the second expression (i