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rand

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

Copy Code

    #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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