3
4
5
6
7for i in range(9):#从0循环到8i += 1#等价于 i = i+1for j in range(i):#从0循环到ij += 1print(j,'*',i,'=',i*j,end = ' ',sep='')# end默认在结尾输出换行，将它改成空格 sep 默认 j,'*',i,'=',i*j 各元素输出中间会有空格print()#这里作用是输出换行符
2
3
4
5
6
7
8i = 1
while i <= 9:j = 1while j <= i:print("%d*%d=%d" % (j,i,i*j),end=' ') # 格式化输出j += 1i += 1print()

3
4
5
6
7
8
9
10
11
12
13
14user = 'hello world'
paswd = 123456
username = input("请输入用户名：")
password = input("请输入密码:")
for i in range(3):if username == user and int(password) == paswd: #判断用户名和密码是否都匹配print("欢迎您的到来")breakelif i < 2:username = input("请输入用户名：")password = input("请输入密码")elif i == 2:print("账户已锁定")break

shop_car = []#用来存放购买的商品
goods = {1:['手机',2500],2:['电脑',3500],3:['自行车',4500],4:['宝马',20000]
}#商品列表
while True:salary = input("你有多少钱：") # 输入有多少钱if salary.isdigit(): # 判断是否为整数salary = int(salary) # 将字符串转化为整数print("是否要买东西：")flag1 = input("Y   N:")if flag1.upper() == 'N': # 将字符串大写exit("欢迎下次光临") # 退出程序并输出“欢迎下次光临”elif flag1.upper() == 'Y':break        # 终止循环elif flag1.upper() == 'Q':exit("欢迎下次光临")elif salary.upper() == 'Q':exit("欢迎下次光临")
while True:print("淘宝".center(30,'-')) # 输出以-----淘宝------for i in goods: # 循环输出print(i,goods[i])print("淘宝".center(30, '-'))choice_good = input("请输入商品编码：")#接受一个字符串if choice_good.isdigit() :choice_good = int(choice_good)if choice_good >= 1 and choice_good <= 4:if salary >= goods[choice_good][1]:shop_car.append(goods[choice_good][0]) # 给字典中添加元素salary = salary - goods[choice_good][1]print("您购买的商品为：", goods[choice_good][0])print("余额为：", salary)print("是否继续：")contin = input("Y  N")if contin.upper() == 'N':breakelif contin.upper() == 'Q':breakelse:print('余额不足')print("是否继续：")contin = input("Y  N")if contin.upper() == 'N':breakelif contin.upper() == 'Q':breakelse :print("没有这个编号")continue # 暂停本次循环elif choice_good.upper() == "Q" :breakelse:print("我看不懂。。。")
print("你买了：",end =' ')
for i in shop_car:print(i,end=' ')
print()
print("余额为：",salary)
print("欢迎下次光临")shop_car = []#用来存放购买的商品
goods = {1:['手机',2500],2:['电脑',3500],3:['自行车',4500],4:['宝马',20000]
}#商品列表
while True:salary = input("你有多少钱：") # 输入有多少钱if salary.isdigit(): # 判断是否为整数salary = int(salary) # 将字符串转化为整数print("是否要买东西：")flag1 = input("Y   N:")if flag1.upper() == 'N': # 将字符串大写exit("欢迎下次光临") # 退出程序并输出“欢迎下次光临”elif flag1.upper() == 'Y':break        # 终止循环elif flag1.upper() == 'Q':exit("欢迎下次光临")elif salary.upper() == 'Q':exit("欢迎下次光临")
while True:print("淘宝".center(30,'-')) # 输出以-----淘宝------for i in goods: # 循环输出print(i,goods[i])print("淘宝".center(30, '-'))choice_good = input("请输入商品编码：")#接受一个字符串if choice_good.isdigit() :choice_good = int(choice_good)if choice_good >= 1 and choice_good <= 4:if salary >= goods[choice_good][1]:shop_car.append(goods[choice_good][0]) # 给字典中添加元素salary = salary - goods[choice_good][1]print("您购买的商品为：", goods[choice_good][0])print("余额为：", salary)print("是否继续：")contin = input("Y  N")if contin.upper() == 'N':breakelif contin.upper() == 'Q':breakelse:print('余额不足')print("是否继续：")contin = input("Y  N")if contin.upper() == 'N':breakelif contin.upper() == 'Q':breakelse :print("没有这个编号")continue # 暂停本次循环elif choice_good.upper() == "Q" :breakelse:print("我看不懂。。。")
print("你买了：",end =' ')
for i in shop_car:print(i,end=' ')
print()
print("余额为：",salary)
print("欢迎下次光临")