28 lines
809 B
Elixir
28 lines
809 B
Elixir
defmodule Raindrops do
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@doc """
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Returns a string based on raindrop factors.
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- If the number contains 3 as a prime factor, output 'Pling'.
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- If the number contains 5 as a prime factor, output 'Plang'.
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- If the number contains 7 as a prime factor, output 'Plong'.
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- If the number does not contain 3, 5, or 7 as a prime factor,
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just pass the number's digits straight through.
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"""
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@spec convert(pos_integer) :: String.t()
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def convert(number) do
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if rem(number, 3) != 0 && rem(number, 5) != 0 && rem(number, 7) != 0 do
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"#{number}"
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else
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res = ""
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res = res <> if rem(number, 3) == 0, do: "Pling", else: ""
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res = res <> if rem(number, 5) == 0, do: "Plang", else: ""
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res = res <> if rem(number, 7) == 0, do: "Plong", else: ""
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res
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end
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end
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end
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