c program to find sum of first n natural numbers

C Program To find the sum of first n natural numbers where n is entered by user.                          

Code :

  

#include <stdio.h>

int main()

{

    int n;

    int sum=0;

    printf("Enter the value of n:");

    scanf("%d",&n);

    for(int i=1;i<=n;i++)

    {

        sum=sum+i;

    }

    printf("Sum of first n natural number:%d",sum);

    return 0;

}

 

Sample Input and Output:

Enter the value of n:5                                                                                                               

Sum of first n natural number:15    

 

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