python 控制语句

 for循环

 

>>> for i in range(3):
    print i


0
1
2

while循环

 

>>> def fib(n):
    a,b = 0,1
    while b < n:
        print b,
        a,b = b, a+b


>>> fib(1000)
1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987