变量

一、数字型 Number

Lua 数值的最大值：

print(9223372036854775807 + 1)

Lua 数值的精度为 13 位：

print(1.9999999999999 + 0.00000000000001)

二、布尔型 Boolean

isLogin = true
print(type(isLogin))

三、空型 Nil

print(type(madeupvar))

四、字符型 String

字符拼接：

age = 15
name = "cael"
print('Hello ' .. name .. ", you are're " .. age .. " now.")

多行字符：

longString = [[
This is a multi line string,
which you can print as many as lines you want.
]]
print(longString)

字符长度：

local quote = "I changed my password everywhere to 'incorrect.' That way when I forget it,it always reminds me, 'Your password is incorrect.'"
io.write("Quote Length : ", string.len(quote), "\n")

字符替换：

local quote = "I changed my password everywhere to 'incorrect.' That way when I forget it,it always reminds me, 'Your password is incorrect.'"
io.write("Replace I with me : ", string.gsub(quote, "I", "me"), "\n")

查找字符：

local quote = "I changed my password everywhere to 'incorrect.' That way when I forget it,it always reminds me, 'Your password is incorrect.'"
io.write("Index of password : ", string.find(quote, "password"), "\n")

字符大写或小写：

local quote = "I changed my password everywhere to 'incorrect.' That way when I forget it,it always reminds me, 'Your password is incorrect.'"
io.write("Quote Upper : ", string.upper(quote), "\n")
io.write("Quote Lower : ", string.lower(quote), "\n")