You are given positive integers n and m. Define two integers as follows: num1: The sum of all integers in the range [1, n] (both inclusive) that are not divisible by m. num2: The sum of all integers in the range [1, n] (both inclusive) that are div

differenceOfSums.js

/**
 * @param {number} n
 * @param {number} m
 * @return {number}
 */
var differenceOfSums = function(n, m) {
    let num1 = 0; // Sum of numbers NOT divisible by m
    let num2 = 0; // Sum of numbers divisible by m

    // Loop through all numbers from 1 to n
    for (let i = 1; i <= n; i++) {
        if (i % m === 0) {
            num2 += i; // If divisible by m, add to num2
        } else {
            num1 += i; // If NOT divisible by m, add to num1
        }
    }

    return num1 - num2; // Return the difference
};