Factorial in D

Example for versions D1, D2, gdc 0.24

This example uses iterative factorial definition. 

module factorial;

import std.stdio;

ulong iterative(ulong x)
{
	ulong result = 1;
	
	for (ulong count = 1; count <= x; ++count)
	{
		result *= count;
	}
	return result;
}

int main()
{
	for (int i = 0; i < 17; ++i)
	{
		writefln("%s! = %s", i, iterative(i));
	}
	return 0;
}