Problem
We are required to write a JavaScript function that takes in a number n. Our function should return the sum of all the natural numbers from 1 to n including both 1 and n
Example
Following is the code −
const num = 34; const summation = (num = 1) => { let res = 0; for(let i = 1; i <= num; i++){ res += i; }; return res; }; console.log(summation(num));
Output
Following is the console output −
595