Table of Contents
C Program to Calculate the Sum of Natural Numbers
Example
#include <conio.h>
#include <stdio.h>
void main()
{
int n, i, sum = 0;
printf("Enter a natural number: ");
scanf("%d", &n);
for (i = 1; i <= n; ++i)
{
sum += i;
}
printf("Sum = %d", sum);
getch();
}
Program Output
Enter a positive integer: 10
Sum = 55