Example: Sum of Natural Numbers up to 100 (Formula) in C

C
C++
C#
Java
Python
PHP

// Sum of Natural Numbers up to 100 (Formula)
#include <stdio.h>

int main() {
    // Step 1: Define the upper limit (n)
    int n = 100;

    // Step 2: Calculate the sum using the formula
    int sum = n * (n + 1) / 2;

    // Step 3: Print the final sum
    printf("The sum of natural numbers up to 100 is: %d\n", sum);

    return 0;
}