print(“hello，world”)
✕
print(“hello，world”)
..可以用来做字符串组拼；使用#来运算字符串的长度
table
print（type(type)）
返回function
print(type(x))
变量x未定义类型，返回nil
mytable={"lua","c","c++","c#"}
mymetatable={
__add=function (tab,newtable)
local mi=0
for k,v in pairs(tab) do
if(k>mi) then
mi=k
end
end
for k,v in pairs(newtable) do
mi=mi+1
table.insert(tab,mi,v)
end
return tab
end
}
mytable = setmetatable(mytable,mymetatable)
newtable = {"java","boo","php"}
for k,v in pairs(mytable) do
print("相加之前立刻输出mytable："..k,v)
end
print(".....................................")
for k,v in pairs(newtable) do
print("相加之前立刻输出newtable："..k,v)
end
print(".....................................")
num=newtable+mytable --newtable自身基础之上加mytable
fun=mytable+newtable -- mytable在自身基础之上再加newtable(等同于mytable+newtable+mytable)
for k,v in pairs(newtable) do
print("相加时立刻输出newtable："..k,v)
end
print(".....................................")
for k,v in pairs(mytable) do
print("相加时立刻输出mytable："..k,v)
end
print(".....................................")
for k,v in pairs(num) do
print("相加完之后立刻输出num："..k,v)
end
print(".....................................")
for k,v in pairs(fun) do
print("相加完之后立刻输出fun："..k,v)
end
print('Hallo World')
数据类型
nil
boolean
number
string
function
userdata
thread
table
86287741427927965502054627678583973344898412197872091167350662069171495015305911796757360434110987930924242177307916832278861619
782459
【漂亮
Function add(num1,num2,func)
res = num1 + num2
func(res)
end
printfunc = Function (res)
print(res)
end
add(40,50,printfunc)
for k,v in pairs(tab) do
end
while a<7 do
end
a = 1
repeat
print(a)
a=a+1
until(a>10)
输出了1-10
number
if then
else
lua的多变量赋值真心好用
print("Hello world")
多练
区分大小写的
print(type(2))
print(type(2.2))
print(type(true))----boolean
print(type(nil)) ----nil
if true then
print(true)
end
if nil then
print("nil被当做true处理")
end
if nil then
print("nil被当做true处理")
else
print("nil被当做false处理")
end
1.注释：
--[[
aaaa
--]]
2.nil用法
table= {key1 = "aa", key2 = "bb" }
print(table.key1)
table.key1 = nil
table = nil
