Constexpr

An example that shows how to use constexpr for compile-time evaluation.

cppCopy code#include <iostream>

constexpr int factorial(int n) {
    return n <= 1 ? 1 : n * factorial(n - 1);
}

int main() {
    std::cout << "Factorial of 5: " << factorial(5) << std::endl; // Output: 120
    return 0;
}