Lua编程->语法快速入门

首先给个swap函数

i1,i2=3,4 print(i1,i2)  i1,i2=i2,i1 print(i1,i2) 

--单行注释  （大小写敏感） --[[ 保留符 and  break  do  else elseif end  false  for function if in   local  nil not or true repeat return then  until while ]]--

days = {"Suanday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"  } for i,v in ipairs(days) do  print(v) end  function f(x)     print("function")     return x*2 end for i=1,f(5) do print(i) end 

Lua while 语句使用

i = 1 while i <= 5 do print("i is now " .. i)     if i < 2 then 		print("small")     elseif i < 4 then 		print("medium")     else 		print("big")     end 	i = i + 1 end

Lua repeat语句使用

i = 1 repeat print("i is now " .. i)     if i < 2 then 		print("small")     elseif i < 4 then 		print("medium")     else 		print("big")     end 	i = i + 1 until i > 5

do i3=10  if i3==10 then print "pass" else print "no pass" end end

print(type(print)) print(type("hello world ")) print(type(true)) print(type(12)) print(type(nil))

阶乘函数实现：

function JC(n) if n==0 then return 1 else return n*JC(n-1) end end   print("Please Enter a number:") a=io.read("*number") print(JC(a)) 

function norm(x,y) local n=x^2+y^2 return math.sqrt(n) end  print(norm(12,4))