Create average_mean.js

Author: PatOnTheBack

maths/average_mean.js

@@ -0,0 +1,30 @@
+/*
+    author: PatOnTheBack
+    license: GPL-3.0 or later
+
+    Modified from:
+        https://github.com/TheAlgorithms/Python/blob/master/maths/average.py
+
+    This script will find the average (mean) of an array of numbers.
+
+    More about mean:
+        https://en.wikipedia.org/wiki/Mean
+*/
+
+function mean(nums) {
+    "use strict";
+    var sum = 0;
+    var avg;
+
+    // This loop sums all values in the 'nums' array.
+    nums.forEach(function (current) {
+        sum += current;
+    });
+
+    // Divide sum by the length of the 'nums' array.
+    avg = sum / nums.length;
+    return avg;
+}
+
+// Run `mean` Function to find average of a list of numbers.
+console.log(mean([2, 4, 6, 8, 20, 50, 70]));