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doc: update docs/lua.md

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jaywcjlove 2023-10-18 16:06:44 +08:00
parent 0acb2ca1f3
commit 59509fc94e
1 changed files with 32 additions and 9 deletions
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docs/lua.md
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@ -97,7 +97,9 @@ local html = [[
<html> <html>
<head></head> <head></head>
<body> <body>
<a href="https://www.twle.cn/">简单编程</a> <a href="https://www.twle.cn/">
简单编程
</a>
</body> </body>
</html> </html>
]] ]]
@ -211,6 +213,7 @@ print(x, y) -- 3, 1
```lua ```lua
local tab = {} local tab = {}
tab.one = 2 tab.one = 2
tab.two = 1 tab.two = 1
@ -243,13 +246,13 @@ print(tab.one, tab.two) -- 1 2
:- | :- :- | :-
:- | :- :- | :-
\+ | 加法 `+` | 加法
\- | 减法 `-` | 减法
\* | 乘法 `*` | 乘法
\/ | 除法 `/` | 除法
\% | 取余，求出除法的余数 `%` | 取余，求出除法的余数
\^ | 乘幂，计算次方 `^` | 乘幂，计算次方
\- | 负号，取负值 `-` | 负号，取负值
```lua ```lua
local a, b = 4, 3 local a, b = 4, 3
@ -287,7 +290,27 @@ print(a ^ b) -- 64.0
print(type(tonumber("12"))) -- number print(type(tonumber("12"))) -- number
``` ```
<!--rehype:className=style-round--> <!--rehype:className=style-round-->
<!--rehype:className=wrap-text -->
### goto 语法
<!--rehype:wrap-class=col-span-2-->
```lua
local function isValidNumber(num)
if type(num) ~= "number" then
goto invalidNumber -- 无条件地跳转到代码中的标签 `::invalidNumber::`
end
print("Valid number:", num)
return true
::invalidNumber::
print("Invalid number:", num)
return false
end
isValidNumber(123) -- 输出: Valid number: 123
isValidNumber("abc") -- 输出: Invalid number: abc
```
条件语句 条件语句
--- ---