Web Reference: The terms type expression and annotation expression denote specific subsets of Python expressions that are used in the type system. All type expressions are also annotation expressions, but not all annotation expressions are type expressions. Discover how to implement `function type annotations` in the Hy programming language, including syntax and practical usage. ---...more A type annotation, sometimes called a type hint, is an optional notation that specifies the type of a parameter or function result. It tells the programmer using the function what kind of data to pass to the function, and what kind of data to expect when the function returns a value.
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