Beginner · 8 lessons · free · ages 11+

Learn JavaScript for beginners.

JavaScript makes pages do things. Write a few lines, press Run, and see what your program prints. The lessons start from nothing.

Start lesson 1 Your certificate

8 lessons

What you will do

Print something

Make the program print exactly: Hello, world!

Start →2

Variables

Print age + 1, using the variable age.

Start →3

Strings and template literals

Print Hello, Asha! using the variable name inside a template literal.

Start →4

Numbers and maths

Work out the area of a rectangle 7 wide and 5 high (width × height) and print it.

Start →5

Making decisions with if

If score is 40 or more print Pass, otherwise print Try again.

Start →6

Loops

Print the numbers 1 to 5, one per line, with a for loop.

Start →7

Functions

Write a function called double that returns its input times 2, and print double(21).

Start →8

Arrays: lists of things

Add "banana" to the array, then print how many fruits there are and the list joined with ", ".

Start →

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FAQ

Learn JavaScript: questions

What will I learn in Learn JavaScript?

You will write programs with variables, decisions, loops, functions and lists. Each of the 8 lessons has one small task and automatic checking.

How long does it take?

About 120 minutes in total, 8 short lessons of around 15 minutes each. Go at your own pace.

Do I need to know anything first?

No. It starts from your first line. Some maths (add, multiply, compare) helps.

Do I get a certificate?

Yes. Finish all the lessons and you can download a free certificate of completion with your name. It is a record of what you did, not an accredited qualification.

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