What is the usage of the min function in C++?

In C++, the min function is used to return the smaller of two numbers. Its usage is as follows:

#include <algorithm>
#include <iostream>

int main() {
    int a = 5;
    int b = 3;

    int min_num = std::min(a, b);

    std::cout << "The minimum number is: " << min_num << std::endl;

    return 0;
}

In the example above, the min function will return the smaller number between a and b, which is 3.