Recursion is a programming technique where a function calls itself from "summary" of Python Programming by John M. Zelle
Recursion takes place when a function calls itself. This might sound a bit strange at first, but it can actually be quite useful in solving certain types of problems. For example, consider the problem of calculating the factorial of a number. One way to do this is to use a loop to multiply all the numbers from 1 up to the given number. Another way is to use recursion. When a function calls itself, it enters into a chain of function calls. In order for recursion to work correctly, there must be a base case that is used to stop the chain of function calls. Without a base case, the function will continue to call itself indefinitely, eventually causing a stack overflow. Recursion can be a powerful tool in programming, but it can also be tricky to get right. It requires a good understanding of how functions work and how they int...
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