Question

Write a c programme to find some of the n natural numbers

Answer 1

C Program to Find the Sum of First N Natural Numbers

This C Program calculates the sum of first N natural numbers.

Here is source code of the C program to calculate the sum of first N natural numbers. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

/*

* 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);

}

$ cc pgm3.c

$ a.out

Enter an integer number

1300

Sum of first 1300 natural numbers = 845650

 

$ a.out

Enter an integer number

15

Sum of first 15 natural numbers = 120

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