Math.sum or a likewise, baked in API. Fear not -- summing an array of numbers is easy using
const numbers = [1, 2, 3, 4];
const sum = numbers.reduce((a, b) => a + b, 0);
0 represents the starting value while with
b, one represents the running total with the other representing the value to be added. You'll also note that using
reduce prevents side effects! I'd still prefer something like
Math.sum(...numbers) but a simple
reduce will do!
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