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-2.2.1.78	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.77	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.76	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.75	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.74	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.73	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.72	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.71	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.70	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.69	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.68	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.67	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.66	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.65	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.64	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.63	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.62	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.61	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.60	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm
trackler-2.2.1.59	tracks/elm/exercises/collatz-conjecture/CollatzConjecture.example.elm