sum columns of array javascript code example
Example 1: 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 2: sum of all elements in array javascript
arrSum = function(arr){ return arr.reduce(function(a,b){ return a + b }, 0);}