make text lowercase lua code example

Example 1: lowercase lua

myString = myString:lower()

-- or

myString = string.lower(myString)

Example 2: convert string to lowercase lua

-- convert a string to upper case 
   local s = 'hello world'   s = s:upper()
   --> 'HELLO WORLD'
   
   -- convert a string to lower case   local s = 'HELLO WORLD' 
   s = s:lower()
   --> 'hello world'