/*

     * C program to find the sum of 'N' natural numbers

     */

    #include <stdio.h>



    void main()

    {

        int i, num, sum = 0;



        printf("Enter an integer number \n");

        scanf ("%d", &num);

        for (i = 1; i <= num; i++)

        {

            sum = sum + i;

        }

        printf ("Sum of first %d natural numbers = %d\n", num, sum);

    }