Python 如何循环一行代码，直到用户键入正确答案？

我是一个初学者，我不明白如何循环一行，直到用户键入正确的答案，然后它中断。例如

ask = int(input("How much rice do you want? "))
price_of_1kg = 50
total = ask*price_of_1kg
print("This is the price")
print(f"Value: ${total}")
pay = int(input("Pay this price mentioned above "))
while True:
    if pay == total:
        print("good")
        break
    if pay != total:
        int(input("Hey!! Pay the exact amount "))
        break

print("Thank you, visit again")

```

I want to loop the second if statement until the user enters the correct amount 

---

您可以这样做：

ask = int(input("How much rice do you want? "))
price_of_1kg = 50
total = ask*price_of_1kg
print("This is the price")
print(f"Value: ${total}")
pay = int(input("Pay this price mentioned above "))
while pay != total:
    pay = int(input("Hey!! Pay the exact amount "))

print("Thank you, visit again")

---

好吧，试着逻辑地思考一下。用你自己的话来说，

break

用于什么？什么时候在你的循环中发生？什么时候不应该发生？