Lua笔记4 语句

1. 赋值： 多重赋值， 赋值过程中一一对应

a, b = x, y

a = b, b = y

交换变量 x, y = y, x

2. 局部变量与块

local 定义一个局部变量

3. 控制结构

if a == b then
    r = a + b
elseif a > b then
    r = a - b
else
    r = a / b
end

local i = 1
while a[i] do
    print(a[i])
    i = i + 1
end

repeat
    line = io.read()
until line ~= ""

for i=1, #a do
    if a[i] < 0 then
        found = 1
        break
    end
end