Control flow is the backbone of how programs make decisions, repeat actions, and handle unexpected events. From simple if-else checks to advanced pattern matching, mastering it helps you write smarter ...

Earn these JavaScript certs to demonstrate mastery of the most in-demand skills for the world’s most-used programming ...

Higher-order functions let you treat functions like any other value — passing them around, returning them, and composing them for cleaner, more reusable code. They power everyday tools like map, ...