# From void to Unit

In some functional languagens **all** functions needs to return a value. For the cases when there aren't a value to returns is used the `Unit` type.

The unit type resembles the void type. But in this case, is possible to instance and creates values of `Unit` types.

It is a concrete type, you can create variables and returns `Unit` normally, but it has no data or behavior.

This type is specially useful to allow the cast between `Action` and `Func` delegates, besides that, it allows operations that can't create a value in a chainable composition.


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