This function will try to convert the string, even for UTF8 characters.
string.upper(str)
Converts all lowercase characters in a string into uppercase characters.
Parameters
str
The string to be used to produce a string with uppercase characters.
Return value
Returns a new string with the same content but uppercase characters.Example
local console = require "console"
print('Enter your name : ')
local name = console.readln();
if name == name:upper() then
print("Please don't shout !")
else
print('Hi '..name..' !')
end