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))

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Lua编程->语法快速入门

原文：http://blog.csdn.net/sunboyiris/article/details/23761765