username = 'gyc'

password = 'gyc'

u = input("what is you name?:")

p = input("mima:")

print(u,p)

#! /usr/bin/env python3.5

# *-* coding:utf-8 *-*

gyc = 18

age = int(input("请输入gyc的年龄："))

if age == 18: #判断用户输入的值是否与初始值匹配

    print("very good!")

else: #否则，错误！

    print("对不起，你不是gyc！")

gyc = 18

nub = 0

while True:  #循环条件为真

    nub += 1

    if nub == 3:

        print("结束")

        break

    age = int(input("请输入gyc的年龄："))

    if age == 18:

        print("very good!")

    else:

        print("对不起，你不是gyc！")

#! /usr/bin/env python3.5

# *-* coding:utf-8 *-*

gyc = 18

nub = 0

while nub <= 3:

    nub +=1

    age = int(input("请输入gyc的年龄："))

    if age == 18:

        print("very good!")

    else:

        print("对不起，你不是gyc！")

gyc =('I love you')

nub = 0

while nub < 4:

    nub += 1

    g = input("请输入我爱你的英文：")

    if g == gyc:

        print("I love you me too!")

        break #当然输入的与初始化的匹配，会结束循环，不在往下执行

    else:

        print("请输入 I love you")

for i in range(10):

    if i % 2 == 0:

        continue  #当 i 整除 2 时  跳出当前循环 执行下一条件

    print(i)
输出结果为 1 3 5 7 9