Day2.跳出多层循环+购物车

购物车程序：

# 1）你可以买下面的东西
# 2）放入购物车，扣钱，同事打印余额
# 3）您买了下面的东西
# 4）您还有多少钱

product_list=[["苹果",10],["椰子",200],["菠萝",20],["火龙果",50],]
shopping_cart=[]
salary=int(input("请输入你的薪资："))
while True:
    index=0
    for product in product_list:
        print(index,product)
        index+=1
    choice=input(">>>:")
    if choice.isdigit():
        choice=int(choice)
        if choice>= 0 and choice<(len(product_list)):
            product=product_list[choice]
            if salary >= product[1]:
                shopping_cart.append(product)
                salary -= product[1]
                print(product[0]+"已成功购买,您还剩余"+str(salary)+"元钱")
            else:
                print("余额不足,还差"+str(product[1]-salary)+"元钱才能购买"+product[0])
        else:
            print("商品不存在!")
    elif choice == "q":
        print("-------商品列表-------")
        for i in shopping_cart:
            print(i)
        print("您的余额为："+str(salary))
        print("---------end----------")
        break
    else:
        print("不能识别该选项")

while循环中跳出多层循环代码如下：

flag_break = False
count = 0
while flag_break == False:
    print("---aaa")
    while flag_break == False:
        print("--bb")
        while flag_break == False:
            count+=1
            if count > 5:
                flag_break = True
            print("-c")
print("chulaile!!!")

for循环中跳出多层循环代码如下：

flag_break = False
for i in range(5):
    print("-aaa")
    for j in range (5):
        print ("--bbb")
        if j == 3:
            flag_break = True
            break
        for k in range (5):
            print ("---ccc")
            if k == 2:
                flag_break = True
                break
        if flag_break:
            break
    if  flag_break:
        break
print ("chulaile")