rand()

Prototype: int rand();
Header File: stdlib.h (C) or cstdlib (C++)
Explanation: rand returns a value between(inclusive) 0 and and RAND_MAX (defined by the compiler, often 32767). To get a more mangeale number, simply use the % operator, which returns the remainder of division.

Example:

//Program returns a random number
#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{
    cout<<rand();
    cout<<rand()%6;  //Number between 0 and 5
}

Other Functions