Programming Entry Level: examples recursion

Recursion is a programming technique where a problem is solved by breaking it down into smaller instances of the same problem, with a base case that stops the recursion and a recursive step that moves closer to the base case. A recursive function calls itself within its own definition, and it's essential to have a base case to avoid infinite recursion. The factorial function is a classic example of recursion, where the function calls itself with a modified input until it reaches the base case. Common mistakes when working with recursion include missing a base case, incorrect recursive steps, and complex base cases. Recursion can be used in real-world scenarios, such as calculating the sum of all numbers in a list. To practice recursion, try exercises like calculating the power of a number, reversing a string, or finding the maximum value in a list. With practice, you'll become more comfortable with this powerful technique and be able to explore more complex recursive algorithms.