while语句--python

#!/usr/bin/python3

a,b=0,1

while(b<10):

    print(b,end=" ")

    a,b=b,a+b

1 1 2 3 5 8 

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#!/usr/bin/env python3

 

n = 100

sum = 0

counter = 1

while counter <= n:

    sum = sum + counter

    counter += 1

 

print("1 到 %d 之和为: %d" % (n,sum))

#1 到 100 之和为: 5050

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#!/usr/bin/python3

 

var = 1

while var == 1 :  # 表达式永远为 true

   num = int(input("输入一个数字  :"))

   print ("你输入的数字是: ", num)

print ("Good bye!")

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#!/usr/bin/python3

 

count = 0

while count < 5:

   print (count, " 小于 5")

   count = count + 1

else:

   print (count, " 大于或等于 5")

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#!/usr/bin/python

flag = 1

while (flag): print ('欢迎访问菜鸟教程!')

print ("Good bye!")