The answer
Recursion is a technique where a function calls itself to solve a progressively smaller instance of the same problem until it reaches a base case.
Recursive vs Iterative Functions (Brief Intro)
What is recursion?
More FAQs in Recursive vs Iterative Functions (Brief Intro)
An iterative function uses loops (for, while) to repeat a block of code until a specific condition evaluates to false.
Usually, yes. Recursion has overhead because the system must allocate memory and manage the Call Stack for every single function call.
Recursion is highly recommended for problems involving Trees, Graphs, Backtracking, and Divide & Conquer (like Merge Sort), where iteration becomes overly complex.
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