Programming Languages

Welcome to coding world

C Program to find the Sum of First n Natural numbers

 Program to find the sum of first n natural numbers. We will see two C programs to calculate the sum of natural numbers. In the first C program we are using for loop for find the sum and in the second program we are doing the same using while loop.

Program to find sum of natural numbers using for loop

The user enters the value of n and the program calculate the sum of first n natural numbers using for loop.

 #include <stdio.h>

int main()

{

    int n, count, sum = 0;

 

    printf("Enter the value of n(positive integer): ");

    scanf("%d",&n);

 

    for(count=1; count <= n; count++)

    {

        sum = sum + count;

    }

 

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

 

    return 0;

}

Output:

 

Enter the value of n(positive integer): 6

Sum of first 6 natural numbers is: 21