I've been coding in C++ for about two months now and I'm comfortable with basic to medium-level problems involving arrays, strings, linked lists, and hashing. However, I seem to be stuck when it comes to understanding recursion. Can anyone help me get started with figuring out how recursion works?
4 Answers
It might help to understand activation records, which are used in recursion. There's a good resource here: [Activation Record Link](https://www.cs.princeton.edu/courses/archive/spr03/cs320/notes/7-1.pdf) - just a little extra info to wrap your head around!
If you enjoy reading, I recommend picking up 'The Little Schemer.' It's around 200 pages and does a fantastic job of teaching recursion concepts in a very digestible way.
To really grasp recursion, try drawing the code flow on paper. Utilize a debugger to step through each function call, checking the variables and return values at each step. Remember that recursion is just a function calling itself until it meets a stopping condition.
Recursion is essentially when a function calls itself with a smaller or simpler input until it reaches a base case, which stops the calls. A very basic example would be the factorial function, which continues to call itself with decreasing values until it hits zero. Understanding the flow of function calls is key. Do you have a specific example you’re struggling with?

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