if while for break continue
if
number = 23
guess = int(input("enter an integer: "))
if guess == number:
print('you are right')
elif guess < number:
print('small')
else:
print('big')
print('done')
while
number = 23
running = True
while running:
guess = int(input("enter an integer: "))
if guess == number:
print('you are right')
running = False
elif guess < number:
print('small')
else:
print('big')
print('done')
(注意缩进)
for
for i in range(1,5):
print(i)
else:
print('the for loop is over')
Break
while True:
s = input('Enter something : ')
if s == 'quit':
break
print('length of the string is',len(s)) #注意缩进
print('done')
continue
while True:
s = input('Enter something : ')
if s == 'quit':
break
if len(s) <3:
print('Too small')
continue
print('length of the string is',len(s)) #注意缩进
print('done')