Hoon101/101/week3/assignment_3a.hoon
2019-09-26 14:47:30 +12:00

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:: Hoon 101: Assignment 3a. Comment each line of code to tell the reader what the code is doing.
:: Comments should be written as "breathing comments" as suggested in the Hoon Style Guide: https://urbit.org/docs/learn/hoon/style/
:: create a gate, with the sample @ud, given the face n
::
|= n=@ud
:: attach a 't' faced @ud to the subject, with the value 1
::
=/ t=@ud 1
:: create and execute a gate, such that we can recurse back to this point
::
|-
:: if n is 1, return the next child, otherwise the one after
::
?: =(n 1)
:: at the end, return our total
::
t
:: otherwise recurse with n minus one,
:: and t multiplied by n. note t is
:: not reset with the recurse, as it
:: is attached before our recurse point
::
$(n (dec n), t (mul t n))