What is nil in Lua?
Introduction
In Lua, there is a single value type called nil.
Lua uses this type as a non-value to represent the absence of a valid value.
The main property of nil is that it is different from any other type in the language.
Usage
nil is assigned to every global variable we create by default. We can also set nil to a global variable to delete it.
Note:
nilis also useful if you want to delete object instances and array elements.
Example
In this example, we use nil to delete a variable.
x = 1print(x)x = nilprint(x)x = {zero = 0,one = 1}x.zero = nilprint(x.zero)
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