python - while if else循环判断值的顺序

Question

def showMaxFactor(num):

count=num//2
while count>1:
    if num % count==0:
        print('%d最大的约数是%d'%(num,count))
        break
    count-=1
else:
    print('%d是素数！'%num)

num=int(input('请输入一个数：'))
showMaxFactor(num)
请输入一个数：9
9最大的约数是3

运行过程：count=9//2=4>1，判断9%4=1！=0. 所以count=4-1 在循环while吗

是这样的吗

Answer 1

The understanding of the running process is correct, but there is something wrong with the code.
Match based on python代码的缩进规则，最后一个else不能和if. You can write it like this:

while count>1:
    if num % count==0:
        print('%d最大的约数是%d'%(num,count))
        break
    count-=1
if count == 1:
    print('%d是素数！'%num)

Answer 2

Yes, unless you break above or count>1, it must still be in the while loop, and the syntax mentioned above hahaha