为什么这段代码会经历无限？

问题描述

为什么下面的代码会无限循环？第一次返回是9 它不再等于 10。我无法得到它。有人能简单解释一下吗？

n = 10
while True:
    print(n,end=' ')
    n = n - 1
print('Done!')

解决方法

while True 永远存在，因为 True 永远是 True。

如果您想在 n 变为 0 时结束循环，请尝试：

n = 10
while n > 0:
    print(n,end=' ')
    n = n - 1
    print('Done!')

输出：

10 Done!
9 Done!
8 Done!
7 Done!
6 Done!
5 Done!
4 Done!
3 Done!
2 Done!
1 Done!

n = 10                  # Here you are initializing the variable n as 10
while True:             # Now you are saying,while True (this means forever because you are saying,as long True is true,do this)
    print(n,end=' ') 
    n = n - 1
print('Done!')

我相信你想验证 n 等于 10，所以，条件必须改变：

n = 10                  # Here you are initializing the variable n as 10
while n = 10:           # Now you are saying,while n = 10 (this means only once because the loop changes the value of n)
    print(n,end=' ') 
    n = n - 1
print('Done!')

你使用 while True 没有 break 语句用这个

n = 10
while n>0:
    print(n,end=' ')
    n = n - 1
    print('Done!')

或

n = 10
while True:
    print(n,end=' ')
    n = n - 1
    print('Done!')
    if(n==0):
        break;

loops python