Lesson 24 of 27 · Organising a Program

Learn Regular Expressions In 20 Minutes

Optional, and not really JavaScript — regular expressions work almost identically in every language you will ever use. Twenty minutes here pays off for the rest of your career.

Optional — ticking this does not change your percentage.

Video not playing? Some channels disable embedding, and there is no way around it.Open on YouTubeinstead — then come back and mark it complete.