Lua检查变量的类型是否为float

local num = 3.14

if type(num) == "number" then
    print("The variable is a number.")
elseif type(num) == "string" then
    print("The variable is a string.")
elseif type(num) == "boolean" then
    print("The variable is a boolean.")
else
    print("The variable is of another type.")
end

local num = 3.14

if tonumber(num) ~= nil then
    print("The variable is a float.")
else
    print("The variable is not a float.")
end