Recursive functions call themselves to solve problems from "summary" of C Programming Language by Brian W. Kernighan,Dennis Ritchie
A recursive function is a function that calls itself to solve problems. This may seem like a circular definition, but it is a powerful technique that can be used to simplify complex problems. By breaking down a problem into smaller, more manageable sub-problems, a recursive function can repeatedly call itself until a base case is reached. This base case is the simplest form of the problem, where the function can return a known value without making any further recursive calls.
The key to understanding recursive functions is to recognize that each recursive call operates on a smaller piece of the original problem. As the function calls itself, it gradually reduces the problem until it reaches the base case. At this point, the function can unwind its recursive calls, combining their results to produce a solution to the original problem.
It is important to design recur...
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