Void (Function)

void is the keyword used in GDScript to indicate that a function doesn't return anything.

This is useful to guarantee that a function doesn't return a value. Note that returning null is not the same as returning nothing. null is a value, while returning nothing means the function doesn't give you anything back.

For example, this is not valid GDScript:

func do_nothing() -> void:
  return null

To make it valid, you would need to return nothing:

func do_nothing() -> void:
  pass

Or explicitly return nothing:

func do_nothing() -> void:
  return