else语句

1.if else

so easy~

2.elif

分支

3.for else / while else

求最大约数

def showMaxFactor(num):    count=num/2    while count>1:        if num%count==0:            print "largest factor of %d is %d" %(num, count)            break        count-=1    else:        print num, " is prime"if __name__=="__main__":    for i in xrange(10,21):        showMaxFactor(i)

4.try else

同上面，只有for，while或者try在没有break或者异常情况下，才会进入else语句