Python的while循环

1、while True循环

count = 0
while True:
    print(count)
    count += 1
#无限循环

输出结果：

0
1
2
3

……

2、while <条件> 循环

count = 0
while count < 3:print(count)
    count += 1

输出结果：

0
1
2

3、while-if循环

while True:
    Tom_age = int(input('The age of Tom:'))
    if Tom_age < Tom_true_age:
        print('too smaller')

    elif Tom_age > Tom_true_age:
        print('too bigger')
    else:
        print('You are right.')
        break

输出结果：

The age of Tom:1
too smaller
The age of Tom:16
too bigger
The age of Tom:17
too bigger
The age of Tom:15
You are right.

4、while-else

count = 0
Tom_true_age = 15
while count<3:
    Tom_age = int(input('The age of Tom:'))
    count += 1
    if Tom_age < Tom_true_age:
        print('too smaller')

    elif Tom_age > Tom_true_age:
        print('too bigger')
    else:
        print('You are right.')
        break
else:
    print('You were wrong three times.')

输出结果：

The age of Tom:1
too smaller
The age of Tom:14
too smaller
The age of Tom:16
too bigger
You were wrong three times.