bdb6569 · urbit.org · git.iko.soy

29```

30

31Hoon is a functional language. FizzBuzz is usually defined as a

32−side effect, but officially Hoon has no side effects. This code

32+side effect, but officially Hoon has no side effects. Accordingly,

33−will *return* a list of strings, not *print* a list of strings.

33+this code will *return* a list of strings, not *print* a list of

34−(Of course, if you run this code from the Urbit `dojo` (shell) you

34+strings. (Of course, if you run this code from the Urbit `dojo`

35−will be able to see the product.)

35+(shell) you will be able to see the product.)

36

37The code produces a list in which each item is either a number

38(as a string), "Fizz", "Buzz", or "Fizzbuzz". The value `~` is

39"null" and indicates the end of the list.

40

41Line 1 uses the `|=`

42−*[rune](https://urbit.org/docs/about/glossary#rune)* to define a

42+[rune](https://urbit.org/docs/about/glossary#rune) to define a

43−function of one argument, `end`, which is of the type `atom` (i.e.

43+function that takes one argument, labelled `end`. The argument

44−an unsigned integer).

44+is of the type `atom` (i.e. an unsigned integer).

45

46Line 2 declares a variable, `count`, with initial value `1`.

47

49

50Line 4 defines the product of the loop as a list of `tape`s.

51(A `tape` is a list of characters, one of Hoon's two string

52−types.) The `^-` rune is used for defining the product type the function

52+types.) The `^-` rune is used for defining the type of data the

53−is to return.

53+function is to return.

54

55Line 5 uses the `?:` rune, which is a conditional. This line

56checks whether `count` equals `end`. If so, line 6 (and the