#divide-and-conquer

Recursion

Introduction Recursion is a programming technique where a function calls itself to solve a problem by breaking it down into smaller, similar subproblems. Think of Russian nesting dolls—each doll contains a smaller version of itself until you reach the smallest one that doesn’t open. Recursion is fundamental to computer science and appears in tree traversals, sorting algorithms, mathematical computations, and backtracking problems. While it can seem magical at first, understanding recursion unlocks powerful problem-solving techniques. Read more →

November 19, 2025