Lua 基本语法快速入门

--begin
a = --[[explain]] "ha";
print(a)

if a == "ha" then
	print("if test passed")
else
	print("if used wrong")
end

b,c=2,3
print(b,c)
b,c=c,b
if b==3 and c==2 then
	print("swap test passed")
	print(b,c)
else
	print("swap error")
end

do
	b = 6
	if b==6 then
		print("code block test passed")
	else
		print("code block test error")
	end
end

do
	d=true;
	local e="haha"
end
if d==true and e==nil then
	print("local test passed")
else
	print("local test error")
end

c = 2^3
if c == 8 then
	print("squert test passed")
else
	print("test error")
end

a = "string will be ".."connected"
print(a)

x = x or a --if not x then x = v end
print(x)

print(type(asdf))

c=3-1.2;
print(c)

d = [[
怎么会
  怎么会
	你竟原谅了我?

]]
print(d)

function test (w)
	print("the num is "..w)
	local add=w+1
	return add;
end

b=test(5)
print(add,b)

t={
	100,
	[100] = "I'm the 100th element",
	fsy=
	{
		['age']=22,
		sex = "male",  --如果是字符串，可以去掉引号和括号
	},--元素之间必须用，隔开
	20, -- 相当于t[2]=20
}

print(t[0])
print(t[1])
print(t[100])
print(t.fsy.age)
print(t[2])

g = {
	age = 3,
	add=function (s,n) s.age=s.age+n end
}

g:add(10) --相当于g.add(g,10)
print(g.age)

>lua -e "io.stdout:setvbuf 'no'" "hello.lua" 
ha
if test passed
2	3
swap test passed
3	2
code block test passed
local test passed
squert test passed
string will be connected
string will be connected
nil
1.8
怎么会
  怎么会
	你竟原谅了我?

the num is 5
nil	6
nil
100
I'm the 100th element
22
20
13
>Exit code: 0