factorial

#include <iostream>

// Function to calculate the factorial of a number
int factorial(int n) {
    if (n == 0 || n == 1) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
}

int main() {
    // Input: User provides a number
    int num;
    std::cout << "Enter a number: ";
    std::cin >> num;

    // Calculation: Call the factorial function
    int result = factorial(num);

    // Output: Display the result
    std::cout << "Factorial of " << num << " = " << result;

    return 0;
}