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# rand

Generate random number View version details

### Key Facts

Gyroscopic Couple: The rate of change of angular momentum ( ) = (In the limit).
• = Moment of Inertia.
• = Angular velocity
• = Angular velocity of precession.

Blaise Pascal (1623-1662) was a French mathematician, physicist, inventor, writer and Catholic philosopher.

Leonhard Euler (1707-1783) was a pioneering Swiss mathematician and physicist.

## Interface

#include <stdlib.h>int rand (void)

## Description

Rand function returns a pseudorandom number. The algorithm used in rand function uses a seed to generate the series, which should be initialized to some distinctive value using srand.

### Generate Random Number

#include <cstdlib>
#include <ctime>
#include <iostream>

using namespace std;

int main()
{
srand((unsigned)time(0));
int random_integer;
for(int index=0; index<20; index++){
random_integer = (rand()%10)+1;
cout << random_integer << endl;
}
}

Output: This example of program will output 20 random numbers from 1 to 10.

## Return Values

The rand function returns a pseudo-random integral number between 0 and RAND_MAX (where RAND_MAX is a constant defined in <cstdlib>).

There is no error return.