-- List all global variables
for name, value in pairs(_G) do
    local repr = tostring(value)
    print(string.format("%s = %s", name, repr))
end

-- List all local variables in the current function
-- This will only work if the code is run in a function context
local function list_locals()
    local i = 1
    while true do
        local var_name, var_value = debug.getlocal(2, i)
        if not var_name then break end
        print(string.format("%s = %s", var_name, tostring(var_value)))
        i = i + 1
    end
end

-- Example
local function demo()
    local a = 10
    local b = "hello"
    list_locals()  -- This will list local variables a and b
end

demo()