sum digits in array javascript code example

Example 1: javascript reduce sum

let nums = [1, 2, 3];

nums.reduce((curr, next) => curr + next);

Example 2: Write a function that takes an array of number values and returns the sum.

function amountTotal(amount) {
        var total = 0;
        for (i = 0; i < amount.length; ++i) {
             total += amount[i]; // add each element in an array to total
        }
        return total;// return sum of elements in array
}