How to find the sum of an array of numbers

Question

Given an array [1, 2, 3, 4], how can I find the sum of its elements? (In this case, the sum would be 10.)

I thought $.each might be useful,

Answer 1

Anyone looking for a functional oneliner like me? Take this:

sum= arr.reduce(function (a, b) {return a + b;}, 0);