Awesome

Forth Interpreter

Example of Forth program that gets interpreted correctly (the famous Fizz Buzz programming interview question):

\ Define word (similar to a function)
: fizzBuzz
    cr
    101 1
    do
        i 15 mod 0=
        if
            ." fizzbuzz "
        else
            i 3 mod 0=
            if
                ." fizz "
            else
                i 5 mod 0=
                if
                    ." buzz "
                else
                    i .
                then
            then
        then
        i 10 mod 0=
        if cr
        then
    loop ;

\ Run word
fizzBuzz

Result:

1 2 fizz 4 buzz fizz 7 8 fizz buzz
11 fizz 13 14 fizzbuzz 16 17 fizz 19 buzz
fizz 22 23 fizz buzz 26 fizz 28 29 fizzbuzz
31 32 fizz 34 buzz fizz 37 38 fizz buzz
41 fizz 43 44 fizzbuzz 46 47 fizz 49 buzz
fizz 52 53 fizz buzz 56 fizz 58 59 fizzbuzz
61 62 fizz 64 buzz fizz 67 68 fizz buzz
71 fizz 73 74 fizzbuzz 76 77 fizz 79 buzz
fizz 82 83 fizz buzz 86 fizz 88 89 fizzbuzz
91 92 fizz 94 buzz fizz 97 98 fizz buzz