what is the characteristic of recursion?

Question

1. One or more simple cases.

Answer 1

Recursion is when a function calls itself, inside itself. Kind of confusing to think of it. Kinda like a neverending downward spiral that only ends when it reaches an exit condition

While its a little bit confusing, it can be used to simply solve a bunch of problems, the most popular of which is the Factorial

https://code.sololearn.com/cR5vZ2Im19DB/?ref=app

Answer 2

In simple words, it's a function calling itself. You can refer to some famous recursion cases : factorial numbers and Fibonacci number