rand
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Header File
stdlib.h
Category
Math Routines
Prototype
int rand(void);
Description
Random number generator.
rand uses a multiplicative congruential random number generator with period 2 to the 32nd power to return successive pseudo-random numbers in the range from 0 to RAND_MAX. The symbolic constant RAND_MAX is defined in stdlib.h.
Return Value
rand returns the generated pseudo-random number.
Example
#include <stdlib.h> #include <stdio.h> int main(void) { int i; randomize(); printf("Ten random numbers from 0 to 99\n\n"); for(i=0; i<10; i++) printf("%d\n", rand() % 100); return 0; }
Portability
POSIX | Win32 | ANSI C | ANSI C++ |
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