用户交互与while循环<代码>

#用户交互1 age_oldboy = 56
 guess_age = int(input(">>:"))
 if guess_age == age_oldboy:
     print("bingo")
 else:
     print("you are stupid")

#while循环"""a = int(input("kuan:"))
b = int(input("gao:"))
jishu1 = 1

while jishu1 <= b:                               #外层的while执行一次，则内层while
    jishu2 = 1                                   #要循环完一整次1-a
    while jishu2 <=a:
        print("#",end="")
        jishu2 +=1
    jishu1 +=1
    print()
"""
print("---------------------9×9乘法表----------------------")
num = 9
a = 0
b = 0
while b < num:
    b += 1
    while a < b:
        a +=1
        print(a,"*",b,"=",a*b,end="   ")     #end后面空格换成制表符（\t）后对齐  将a *b 装换成str则省去空格。
    print()
    a = 0

#循环中break与continueflag = True
while flag:
    user_input = int(input(">>:"))
    if user_input == 50:
        print("right")
        flag = False           #替换成break
    elif user_input > 50:
        print("think smaller")
    else :
        print("think bigger")
print("end")
#  break是指跳出循环不执行while  而continue是指继续下个循环（continue下面的都不执行）
---------------------------------------------------------------------------

"""num = 1
while num < 10:
    num +=1
    if num == 3:
        continue
    print(num)                  #结果 2456...11
else:
    print("this for else")         #continue 不会打断while本身所以有“this is for else”   若是换成break则不会有这句话。
"""

上图为没有进行对齐和去空格的操作，具体方法代码中注释有。

用户登录

# _*_ coding:utf-8 _*_# _author:khal_Cgg# _date:2016/8/22Password = "caoge1ge"

count = 0while count < 3:                             # 判断    name = input("your name is:")    age = int(input("your age is:"))        # 再转换成整形，input接收的都是字符串    password = input("type your password:")    salary = input("your salary:")    if salary.isdigit():        int(salary)    else:        print("input a digit")        exit()    if password == Password:        print("welcome,{Name}".format(Name=name))     # 退格的重要性 TAB！=四个空格 官方建议四个空格        info = '''        用户名:%s        年龄:%d        密码:%s        工资:%s        ''' %(name,age,password,salary)                    # s是string d是整形        print(info)        break    else:        print("wrong password ")        count += 1if count == 3:    print("too many tries")# 格式化输出最好先用‘’这样再注释的时候用“# msg = '''                                    #注释多行的快捷键是ctrl+/# ming zi:{_name}# nian ling:{_nianling}# '''.format(_name=name,#            _nianling=age)# print(msg)