Understanding Recursion

Understanding Recursion

Introduction

This tutorial will guide you through understanding recursion and how to use it to solve problems in programming.

Step 1: Define the Problem

We are given a problem that can be broken down into smaller sub-problems of the same type.

Step 2: Define the Base Case

We will define a base case that stops the recursion.

Step 3: Define the Recursive Case

We will define a recursive case that breaks down the problem into smaller sub-problems.

Step 4: Call the Recursive Function

We will call the recursive function with the smaller sub-problems.

Example Code

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)
print(factorial(5))  # Output: 120

Conclusion

In this tutorial, we learned how to use recursion to solve problems in programming.