Checking a value in its available in a string

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how can i check if 203 is avaliable in this string [“101,201,106,102,202,203”]

String.contains? ( if you don’t care about the comma separation. If you do want to split on commas first, you could do something like…

 list_of_strings = String.split(input, ",")
 Enum.any?(list_of_strings, fn x -> x == "203" end)

Edit: Which I would probably code as
Edit2: Fixed typo

 input |> String.split(",") |> Enum.any?(&(&1=="203"))

this solution works… i tested it and it worked… thank you very much