[Lua快速了解一下]Lua的控制语句

Posted 2020-10-27 马大欧

-Lua中没有++或者--的骚操作

-while loop

sum = 0
num = 1
while num <= 100 do
    sum = sum + num
    num = num + 1
end
print("sum =",sum)

-if else

if age == 40 and sex =="Male" then
    print("男人四十一枝花")
elseif age > 60 and sex ~="Female" then
    print("old man without country!")
elseif age < 20 then
    io.write("too young, too naive!\n")
else
    local age = io.read()
    print("Your age is "..age)
end

~=表示!=

io.read()也就是stdin

io.write()也就是stdout

字符串拼接的+也就是..

与也就是and

或也就是or

非也就是not

-for loop

从1加到100

sum = 0
for i = 1, 100 do
    sum = sum + i
end
 

从1到100的奇数和

sum = 0
for i = 1, 100, 2 do
    sum = sum + i
end
 

从100到1的偶数和

sum = 0
for i = 100, 1, -2 do
    sum = sum + i
end

-until loop

sum = 2
repeat
   sum = sum ^ 2 --幂操作
   print(sum)
until sum >1000