From w3schools to Khan Academy to Udemy and more, here’s a roundup of the top programming courses for free. courses available online.

This list of no-cost programming courses includes something for everyone, regardless of whether you want to learn how to code for the first time or check out if you like it before you invest in a paid bootcamp or course. Some classes are introductory while others will teach advanced skills. All are free to begin but will require some time commitment.

For those with little or no experience, w3schools is a great place to start with free beginner-friendly tutorials that will teach HTML and CSS. If you’ve got a little more time, try Udemy’s Tech101-style course that covers all the basics to help you get started.

Scaler’s website for coding courses provides a range of online classes for students of all levels. From data structures to programming languages they cover all basics of what it means to think like an engineer working in software.

Take a look at learning Smalltalk. It’s a simplified version of the computer language Python and is incredibly easy to master. In just a few weeks, you’ll master control structures like loops and if statements, while also getting a feel for the language. There is also a more comprehensive introductory course that will guide you through the concepts and language of object-oriented programming.