Code shared from run.dlang.io.

main.d

import std;

void main()
{
    foreach (n; 1..101) {
     	string rules = (
        	(n % 3 == 0 ? "Fizz" : "") ~
            (n % 5 == 0 ? "Buzz" : "")
        );
            
		"%d: %s".writefln(n, rules ? rules : n.to!string);
    }
}