Lua by Example: Variables

In Lua, variables are declared on first use as global.
`first` is a global variable.	first = "initial" print(first)
You can declare multiple variables at once.	b, c = 1, 2 print(b, c)
Often variables should be declared local to avoid polluting the global scope.	local d = true print(d)
Variables have no predefined types; any variable may contain values of any type.	local value = "starts as a string" print(value)
Assigning a value of a another type	value = 5 print(value)
To unset the value, assign nil	value = nil print(value)

$ lua variables.lua
initial
1    2
true
starts as a string
5
nil

Next example: For.