The Value 'nil'

nil. This special value represents the absence of any value - think of it as an empty container.

In Lua, when you declare a variable but don't assign anything to it, that variable automatically contains nil:

local emptyVariable
print(emptyVariable)  -- This will output: nil

The keyword local is used to declare a variable that belongs to the current scope — meaning it's only accessible within the block of code where it's defined. It's the recommended way to create variables in Lua.

The value nil is Lua's way of saying "nothing is here." It's different from the number 0, an empty string, or the boolean false - it literally means no value has been assigned yet.