Nil in

About Nil

Nil in Gleam is a type with a single value, also called Nil. It is similar to void in other languages in that it is used when a function does not have any more suitable value to return.

io.println("Hello, Joe!")
// -> Nil

Values in Gleam are not "nil-able" or "nullable" like in some other languages. A value can only be Nil if it's type is Nil, and a value of any other type can never be Nil.