if 条件:    满足条件执行代码elif 条件:    上面的条件不满足就走这个elif 条件:    上面的条件不满足就走这个elif 条件:    上面的条件不满足就走这个    else:    上面所有的条件不满足就走这段

age_Lao=23 age_Lao_chun=int(input("猜猜我的年龄:")) #input用户导入输入 if age_Lao_chun==age_Lao:     print("恭喜你猜对了") elif age_Lao_chun>age_Lao:     print("往小一点猜嘛") elif age_Lao_chun

score=int(input("请输入分数线:")) if score>=100:     print("A") elif score>=90:     print("B") elif score>=80:     print("C") else:     print("课程结束了") 密码加密模块

import getpass          #getpass 密码密文 username=input("username:") password=getpass.getpass("password:") print(username,password)

while循环语句

age_Lao=23 count=0 while count<3:  #做出判断猜错三次提出     age_Lao_Chun=int(input("请输入我的年龄:"))     if age_Lao_Chun==age_Lao:         print("你好聪明啊")         break    #猜对了退出循环     elif age_Lao_Chun>age_Lao:         print("猜小一点嘛")     else:         print("猜大一点嘛")     count+=1   #与上面count做判断

一到一百依次打印

number=1 while number<101:     print(number)     number+=1

number=0 while number<10:     number+=1     if number==7:    #判断number==7         continue     # 如果==7 就跳出循环执行下次循环     print(number) 一到一百的总数

number_sum=0 number=1 while number<101:     number_sum+=number     number+=1     print(number_sum) 一到一百的偶数

number_1=1 while number_1<=100:     if number_1 % 2 ==0:          print(number_1)     number_1+=1 一到一百的奇数

number_1=1 while number_1<=100:     if number_1 % 2!=0:     # 2！=0 是除以2不来          print(number_1)     number_1+=1