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-2.2.1.139	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.138	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.137	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.136	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.135	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.134	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.133	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.132	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.131	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.130	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.129	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.128	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.127	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.126	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.125	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.124	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.123	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.122	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.121	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.120	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm