lua语言的判断比较迷,0被视为真
a=0
b=(a==0)
c=(a==1)
d=1
print(a)
print(b)
print(c)
if(b)
then
print("a==0 means true")
end
if(b==1)
then
print("true means 1")
else
print("true do not mean 1")
end
if(c==0)
then
print("false means 0")
else
print("c is false, but not means 0")
end
if(c==1)
then
print("false means 1")
else
print("c is flase, but not means 1")
end
if(1)
then
print("1 means true")
end
if(0)
then
print("0 means true")
end
运行结果
0
true
false
a==0 means true
true do not mean 1
c is false, but not means 0
c is flase, but not means 1
1 means true
0 means true