string.lower

local result = string.lower(input)

--Convert to lowercase
local result = string.lower("HELLO")
engine.print(result) --hello

--Mixed case
local result = string.lower("Hello World")
engine.print(result) --hello world

--Already lowercase (no change)
local result = string.lower("already lowercase")
engine.print(result) --already lowercase

--Numbers and special characters unchanged
local result = string.lower("ABC123!@#")
engine.print(result) --abc123!@#

--Case-insensitive comparison
local str1 = "Hello"
local str2 = "HELLO"

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

--Normalize user input
local input = "YES"
if string.lower(input) == "yes" then
    engine.print("User confirmed")
end

--Convert keys to lowercase
local data = {
    Name = "John",
    Age = 25,
    City = "NYC"
}

for key, value in pairs(data) do
    engine.print(string.lower(key), value)
end
--Output: name John, age 25, city NYC

--Email normalization
local email = "User@Example.COM"
local normalized = string.lower(email)
engine.print(normalized) --user@example.com

--String with only numbers (no change)
local result = string.lower("123456")
engine.print(result) --123456

--Empty string
local result = string.lower("")
engine.print(result) --

--Chaining with other string functions
local result = string.lower("HELLO WORLD"):gsub(" ", "_")
engine.print(result) --hello_world