How To Sum Elements In An Array In Javascript Code Example

Example 1: array sum javascript

const arr = [1, 2, 3, 4];const sum = arr.reduce((a, b) => a + b, 0);// sum = 10

Example 2: javascript sum of array

const sum = arr => arr.reduce((a, b) => a + b, 0);

Example 3: sum of all numbers in an array javascript

const arrSum = arr => arr.reduce((a,b) => a + b, 0)

Example 4: javascript sum array values

function getArraySum(a){    var total=0;    for(var i in a) {         total += a[i];    }    return total;}var payChecks = [123,155,134, 205, 105]; var weeklyPay= getArraySum(payChecks); //sums up to 722

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