Lua Lua 语法

[Yann]

1.变量声明和使用：

name = "John"
age = 25
print("My name is " .. name .. " and I am " .. age .. " years old.")

2.条件语句（if-else）：

score = 85
if score >= 60 then
print("You passed the exam!")
else
print("You failed the exam.")
end

3.循环语句（for）：

for i = 1, 5 do
print("Number: " .. i)
end

4.表（Table）声明和访问：

fruits = {"apple", "banana", "orange"}
print(fruits[1]) -- 输出 "apple"

5.函数声明和调用：

function greet(name)
print("Hello, " .. name .. "!")
end

greet("Alice") -- 输出 "Hello, Alice!"

6.对象（Table）声明和访问：

person = {
name = "John",
age = 30,
greet = function()
print("Hello, my name is " .. person.name .. "!")
end
}

print(person.name)   -- 输出 "John"
print(person.age)    -- 输出 30
person.greet() -- 输出 "Hello, my name is John!"

7.模块导入和使用：

-- 文件1.lua
module = {}
module.variable = "Hello from file 1!"
return module

-- 文件2.lua
local module = require("1")
print(module.variable) -- 输出 "Hello from file 1!"

8.异常处理：

function divide(numerator, denominator)
if denominator == 0 then
error("Division by zero error!")
end
 return numerator / denominator
end

success, result = pcall(divide, 10, 0)
if success then
 print(result)
else
print("Error: " .. result)
end