C++猿的Python笔记02控制流

注意冒号  

  if else  

if ... :

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else :

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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

 

  switch  

没有switch，用if..: elif ..: else: 代替

  while   

while xx:

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else:

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while done == False:

    i = i+1;

    print 'frame', i

else:

    print 'The while loop is over.'

  

  for  

for element in arrays:

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else:

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for i in range(1, 5):

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。