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基础练习
练习1：个人信息打印
local name = "你的名字"
local hobby = "你的爱好"
local years = 3
print("===== 个人名片 =====")
print("姓名:", name)
print("爱好:", hobby)
print("编程经验:", years, "年")
print("======================")
练习2：简单计算
local a = 15
local b = 7
print(a, "+", b, "=", a + b)
print(a, "-", b, "=", a - b)
print(a, "×", b, "=", a * b)
5.2 常见错误分析 ⚠️
错误1：字符串与数字混合运算
local a = 100
local b = "你好"
local c = a * b
-- 报错：attempt to perform arithmetic on a string value
错误2：使用保留字作为变量名
local and = 100
-- 报错：unexpected symbol near 'and'
错误3：变量名以数字开头
local 1name = "张三"
-- 报错：unexpected symbol near '1'
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