javascript Math sum code example
Example 1: array sum javascript
const arr = [1, 2, 3, 4];
const sum = arr.reduce((a, b) => a + b, 0);
Example 2: add all elements in array javascript
console.log(
[1, 2, 3, 4].reduce((a, b) => a + b, 0)
)
console.log(
[].reduce((a, b) => a + b, 0)
)
Example 3: javascript reduce sum
arrSum = function(arr){ return arr.reduce(function(a,b){ return a + b }, 0);}
Example 4: sum function in javascript
let sum = (...para) => para.reduce((d,b) => d + b);
Example 5: summation js
const summation = (n) => (n * (n + 1)) / 2;