# `CaseClauseError`
[🔗](https://github.com/elixir-lang/elixir/blob/v1.20.1/lib/elixir/lib/exception.ex#L1532)

An exception raised when a term in a `case/2` expression
does not match any of the defined `->` clauses.

For example:

    iex> case System.unique_integer() do
    ...>   bin when is_binary(bin) -> :oops
    ...>   :ok -> :neither_this_one
    ...> end
    ** (CaseClauseError) no case clause matching:
    ...

The following fields of this exception are public and can be accessed freely:

  * `:term` (`t:term/0`) - the term that did not match any of the clauses

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*Consult [api-reference.md](api-reference.md) for complete listing*