Case

 case {1, 2} do
  {3, 4} ->
    "This clause won't match."
  {1, x} ->
    "This clause will match and bind x to 2 in this clause."
  _ ->
    "This clause would match any value."
end

case 僅用於匹配特定資料的給定模式。這裡，{1,2} 與程式碼示例中給出的不同的案例模式匹配。