# Find the average for an array of numbers in JavaScript?

itsbambi asked this question 7 months ago itsbambi on Jan 4

I have an array of numbers that looks similar to this:

``````[21, 931, 354, 12, 1254, 432, 234, 654, 51, 90, 43]
``````

How can I get the average of all these numbers?

This is all in JavaScrpt, btw. looper003 on Jan 14

A function you can use:

``````function getAverage(array) {
let total = 0

for (var i=0; i < array.length; i++) {
total += array[i]
}

return Math.round(total / array.length)
}
``````

For your example, it would return:

``````getAverage([21, 931, 354, 12, 1254, 432, 234, 654, 51, 90, 43])

// 371
``````
0 replies coderguy on Jan 14
``````array.reduce((a, b) => a + b) / array.length
``````

Code breakdown:

1. Sum the total of each item in the array using the `reduce()` method.
2. Divide the total sum by the number of items in the array (`array.length`).

If you want to round the result to the nearest whole number, update your code to this:

``````Math.round(array.reduce((a, b) => a + b) / array.length)
``````
0 replies yaboy01 on Jan 14

A method that uses lodash:

``````const _ = require("lodash")

const getAverage = (array) => _.chain(array)
.sum()
.divide(array.length)
.round(1)
.value()

// usage
getAverage(myArray)
``````
0 replies