util.string.reverse

local result = util.string.reverse(
    input
)

local result = util.string.reverse("hello")

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

local result = util.string.reverse("hello world")

core.engine.print("info", result) -- 'dlrow olleh'

local result = util.string.reverse("12345")

core.engine.print("info", result) -- '54321'

local result = util.string.reverse("a")

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

local result = util.string.reverse("")

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

local function isPalindrome(str)
    return str == util.string.reverse(str)
end

core.engine.print("info", isPalindrome("racecar")) -- true
core.engine.print("info", isPalindrome("hello")) -- false

local result = util.string.upper(util.string.reverse("hello"))

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

local result = util.string.reverse("hello!")

core.engine.print("info", result) -- '!olleh'

local original = "test"
local reversed = util.string.reverse(util.string.reverse(original))

core.engine.print("info", reversed == original) -- true

local sentence = "hello world"
local reversed = util.string.gsub(sentence, "%S+", function(word)
    return util.string.reverse(word)
end)

core.engine.print("info", reversed) -- 'olleh dlrow'

local text = "ABC"
local mirror = text.."|"..util.string.reverse(text)

core.engine.print("info", mirror) -- 'ABC|CBA'

local binary = "1010"
local reversed = util.string.reverse(binary)

core.engine.print("info", reversed) -- '0101'

local num = '123456'

core.engine.print("info", util.string.reverse(num)) -- '654321'

local data = 'ABCDEF'

for i = 1, #data do
    local char = util.string.sub(util.string.reverse(data), i, i)
    core.engine.print("info", char)
end

--[[
Output: 
'F'
'E'
'D'
'C'
'B'
'A'
]]