You can also "catch" exceptions to manage errors in Blue with the error-trapping operator (|).
您还能“捕捉(catch)”异常，以便使用错误捕获运算符(|)来管理Blue中的错误。
2
The type system in particular provides you with probably unintended but quite useful error-trapping possibilities.
具体来说，类型系统为您提供了可能未预料到，但非常有用的错误捕捉可能性。
3
This section explores types, conditions, iterations, errortrapping, and classes, followed by a couple of slightly larger Blue applications to pull the elements together.