The return annotation is used in functions to indicate what type of data will be returned. This annotation is created using the `->` syntax:

def addition(first: int, second: int) -> int:
    return first + second

print(addition(15, 12))

Return annotations are helpful for both function users and writers, as they indicate if the function is returning an unexpected data type:

The division operator (`/`) returns a `float` value, but if we expect an `int`, the return annotation can help us identify this potential bug in our function.

> Note
>
> To create the return annotation, you need to use the `->` and type (e.g., `str`) between closed parenthesis `)` and colon `:`.

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Mastering Python: Annotations, Errors and Environment

Return Annotation

Mastering Python: Annotations, Errors and Environment

Return Annotation