Contents

module CollatzConjecture exposing (collatz)


collatz : Int -> Result String Int
collatz start =
    if start <= 0 then
        Err "Only positive numbers are allowed"
    else
        Ok (collatzHelper 0 start)


collatzHelper : Int -> Int -> Int
collatzHelper steps start =
    if start == 1 then
        steps
    else if start % 2 == 0 then
        collatzHelper (1 + steps) (start // 2)
    else
        collatzHelper (1 + steps) (3 * start + 1)

Version data entries

134 entries across 134 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.179	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.178	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.177	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.176	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.175	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.174	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.173	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.172	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.171	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.170	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.169	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.167	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.166	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.165	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.164	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.163	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.162	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.161	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.160	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm