Differentiate between Recursion and Iteration. Give suitable code to find factorial of a number entered by user in C for each.

Recursion and iteration are two different programming concepts that involve repetitive execution of a set of instructions. Both are used to solve problems by breaking them down into smaller, more manageable subproblems. Let's explore the differences between recursion and iteration and provide suitable code examples in both C and Python to find the factorial of a number entered by the user.

### Recursion:

Recursion is a programming concept where a function calls itself in order to solve a smaller instance of the same problem. In the case of calculating the factorial of a number, the factorial of a number 'n' is defined as the product of all positive integers less than or equal to 'n'. The base case in recursion is crucial to prevent infinite recursion and allows the function to return a result.

#### C Code for Recursive Factorial Calculation:

```c
#include <stdio.h>

// Function to calculate factorial using recursion
int factorial(int n) {
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