lua get amount of uppercase characters in string code example

Example 1: Lua string

-- Strings are immutable. Immutable simply means unmodifiable or unchangeable.
a = 'this is a string'

Example 2: lua string length

-- One can get the length of a string by using the # (length) operator.
-- The metamethod for this operator is __len.

local str = "Hello world!";
print(#str); -- 5