python 2nd 條件控制之while語句 +break語句+continue語句

執行個體 while+if+break

while True:
    s = input('Enter something : ')
    if s == 'quit':
        break
    print('Length of the string is', len(s))
print('Done')      

執行個體 while+if+else+break

while True:
    s = input('Enter something : ')
    if s == 'quit':
        break
    else:
        print('Length of the string is', len(s)) 
print('Done')      

number = 23
running = True
while running:
    guess = int(input('Enter an integer : '))
    if guess == number:
        print('Congratulations, you guessed it.')
# 這将導緻 while 循環中止
        running = False
    elif guess < number:
        print('No, it is a little higher than that.')
    else:
        print('No, it is a little lower than that.')
else:
        print('The while loop is over.')
# 在這裡你可以做你想做的任何事
print('Done')      

#continue 語句用以告訴 Python 跳過目前循環塊中的剩餘語句，并繼續該循環的下一次疊代。
while True:
    s = input('Enter something : ')
    if s == 'quit':
        break
    if len(s) < 3:
        print('Too small')
        continue
print('Input is of sufficient length')