summation function in javascript code example
Example 1: sum function in javascript
let sum = (...para) => para.reduce((d,b) => d + b);
Example 2: summation js
const summation = (n) => (n * (n + 1)) / 2;
let sum = (...para) => para.reduce((d,b) => d + b);
const summation = (n) => (n * (n + 1)) / 2;