注意冒号
if else
if ... :
缩进
else :
缩进
if guess == number:
print 'Congratulations, you guessed it.' # New block starts here
running = False
elif guess < number:
print 'No, it is a little higher than that' # Another block
# You can do whatever you want in a block ...
else:
print 'No, it is a little lower than that'
# you must have guess > number to reach here
print 'Congratulations, you guessed it.' # New block starts here
running = False
elif guess < number:
print 'No, it is a little higher than that' # Another block
# You can do whatever you want in a block ...
else:
print 'No, it is a little lower than that'
# you must have guess > number to reach here
switch
没有switch，用if..: elif ..: else: 代替
while
while xx:
缩进
else:
缩进
while done == False:
i = i+1;
print 'frame', i
else:
print 'The while loop is over.'
i = i+1;
print 'frame', i
else:
print 'The while loop is over.'
for
for element in arrays:
缩进
else:
缩进
for i in range(1, 5):
print i
else:
print i
else:
print 'The for loop is over'
break
终止循环。
注意：如果你从for或while循环中终止 ，任何对应的循环else块将不执行。
continue
逃过本次循环后面的语句，进入下一轮循环。
注意：continue语句对于for循环也有效。