D Documentation  
rand
uint rand()

This function returns a random number.

Note: Use rand_seed to create a repeatable sequence of random numbers.

Example:
import std.stdio;
import std.random;
void main()
{
    for(int i = 1; i <= 5; i++)
        writefln("rand() returns %d", rand());
}

Output could be:
rand() returns 2018360261
rand() returns 4236961988
rand() returns 1858414318
rand() returns 2437703434
rand() returns 1482694331

See also:
rand_seed
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