1.使用if語句

#if.py number = 23; guess = int(raw_input('Enter an integer:'));if guess == number:print 'congratulations, u guessed it';print 'but u dont win any prize'; elif guess < number:print 'no,it is a little heigher than that'; else:print 'no,it is a little lower than that';print 'Done';

2.使用while語句

#while.py number = 23; running = 1; while running:guess = int(raw_input('Enter an integer:'));if guess == number:print 'congratulations, u guessed it';running = 0;elif guess < number:print 'terribly,it is a little lower than that';else:print 'terribly,it is a little heigher than that'; else:print 'that while loop is over'; print 'Done';

3.使用for...in語句

#for.py for i in range(1,5):print i; else:print 'the for loop is over';

4.使用break語句

#break.py while True:s = raw_input('Enter something:');if s == 'quit':break;print 'Length of the string is : ' , len(s); print 'Done';

5.使用Continue語句

continue語句用來告訴Python條股當前循環塊中的剩余語句，然后繼續執行下一輪循環。 #break.py while True:s = raw_input('Enter something:');if s == 'quit':break;if len(s) < 3:continue;print 'Input is of sufficient length';

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