Grasshopper - Summation.md

Description:

Write a program that finds the summation of every number from 1 to num. The number will always be a positive integer greater than 0.

Examples (input --> output):

summation(2) -> 3
1 + 2

summation(8) -> 36
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8

Solution:

var summation = function (num) {
  let res = 0
  for(let i = 0; i <= num; i++){
    res += i;
  }
return res;
}