Important Notice:

Practice-It will be discontinued as of November 1st, 2024. After this date, the website will remain online for a transitional period, but login will be restricted to University of Washington NetID authentication. This marks the next phase towards the platform's full retirement. Thank you for your use and support of the application over the years.

If you are looking for an alternative, a similar tool, CodeStepByStep, was developed independently by the original author of Practice-It, and is available at codestepbystep.com**

logo Practice-It logo

Main Page → Problems → Solve a Problem

average

Language/Type: JavaScript arrays
Author: Melissa Medsker-Galloway (on 2016/11/18)

Write a function named average that accepts an array of numbers as a parameter and returns the average of all of the numbers in the array. Recall that the average value of a collection of numbers is determined by the overall sum of the values divided by the number of values in the collection. For example, if an array variable named called nums stored the following values: 

var nums = [-1, 3.0, 12, 15, -4, 1, -12.5, 1, 8];

Then the call of average(nums) should return 2.5 since that is the average of all of the values in the array.

You may assume that the array passed to your function is non-empty and contains only number types.

Type your solution here:


This is a function problem. Write a JavaScript function as described. Do not write a complete program; just the function(s) above.

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.