循环直到特定输入

Question

我需要编写一个程序：

1. 要求开始帐户余额;
2. 让我输入我的提款金额并循环这个问题，直到我输入0;和
3. 告诉我帐户余额 - 无论是正面还是负面。

我遇到问题的主要区域：2。 - 撤回直到循环。

示例输出：

What is your starting balance: $ 1000.00
What is your withdrawal amount: $ 250.00
What is your withdrawal amount: $ 295.00
What is your withdrawal amount: $ 187.50
What is your withdrawal amount: $ 0
Your account balance is: $267.50

Answer 1

#!/usr/bin/env python3.3

amt = int(input("What is your starting balance: $"))
while(True):
    i = int(input("What is your withdrawal amount: $"))
    if(i == 0):
        break
    else:
        amt -= i

print("Your account balance is:"+str(amt))