rand function

rand will generate a random number between 0 and 'RAND_MAX' (at least 32767).

Library:   stdlib.h

Prototype: int rand(void);

Syntax:	   int r;                 		/* Random number	*/

           r = rand();

Notes

Rand will always produce the same sequence of numbers unless srand is called to seed the start point.
RAND_MAX is only defined in ANSII header files.
A non standard function random is available on the Sun.