FrizzBuzz in swift

fizzBuzz.swift

func frizzBuzz(range:Int) -> Void {
    for num in 1..<range {
        var output:String = "";
        
        if num % 3 == 0 { 
            output = "frizz";
        } 
        
        if num % 5 == 0 {
            output += "buzz";
        }
        
        print(String(num) + " :" + output);
    }
}

frizzBuzz(20);