# C program to find the sum of n numbers using for loop

Last updated:9th Aug 2022

In this program. you will take positive integer input from a user for finding the sum of n natural numbers by using for loop in the C program.

To find the sum of the 10 natural numbers, you will add all numbers from 1 to 10. for example. 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10.

## Sum of n number by using for loop

``````
#include <stdio.h>
int main() {
int n, i, sum = 0;

printf("Enter value of n for finding sum of n: ");
scanf("%d", &n);

for (i = 1; i <= n; i++) {
sum = sum + i;
}

printf("sum of %d natural number is: %d", n,sum);
return 0;
}
``````

## output

```Enter value of n for finding sum of n: 10
sum of 10 natural number is: 55```

## Explanation of sum of n number by using for loop.

• Take a number from the user and store the number in a variable `n`.
• iterate for loop from `1` to `n`.
• inside for loop, add the value of `i` in the `sum` variable.
• after the end of the loop print the sum of n values.