string.lower

local result = string.lower(input)

local result = string.lower("HELLO")

engine.print("info", result) --'hello'

local result = string.lower("Hello World")

engine.print("info", result) --'hello world'

local result = string.lower("already lowercase")

engine.print("info", result) --'already lowercase'

local result = string.lower("ABC123!@#")

engine.print("info", result) --'abc123!@#'

local str1 = "Hello"
local str2 = "HELLO"

if string.lower(str1) == string.lower(str2) then
    engine.print("info", "Strings are equal (case-insensitive)")
end

local input = "YES"

if string.lower(input) == "yes" then
    engine.print("info", "User confirmed")
end

local data = {
    Name = "John",
    Age = 25,
    City = "NYC"
}

for key, value in pairs(data) do
    engine.print("info", string.lower(key), value)
end

--[[
Output: 
'name John'
'age 25'
'city NYC'
]]

local email = "User@Example.COM"
local normalized = string.lower(email)

engine.print("info", normalized) --'user@example.com'

local result = string.lower("123456")

engine.print("info", result) --'123456'

local result = string.lower("")

engine.print("info", result) --''

local result = string.lower("HELLO WORLD"):gsub(" ", "_")

engine.print("info", result) --'hello_world'