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-2.2.1.119	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.118	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.117	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.116	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.115	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.114	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.113	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.111	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.110	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.109	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.108	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.107	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.106	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.105	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.104	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.103	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.102	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.101	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.100	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.99	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm