如何连续用Python重新运行程序？

Question

I created a program that calculates how much money is saved after a "percentage off" is applied. The user is able to input the price of the product as well as the percentage off. After the program does the calculation, how do I continuously loop the program so that the user can keep using it without me having to click "run" each time in the console.

def percent_off_price():
    price = amount * percent

    amount = float(input('Enter the price of your product: '))
    percent = float(input('Enter the percentage off: '))
    price = amount * percent
    print('You will save $',price,'off!  Your total is: $',amount - price,)

Answer 1

Put the whole code segment in a while loop which runs always but it is the worst thing you would want:

while True:      
    amount = float(input('Enter the price of your product: '))
    percent = float(input('Enter the percentage off: '))
    price = amount * percent
    print('You will save $',price,'off!  Your total is: $',amount - price,)

You can also put a check to run it for controlled amount. Hence it would only run if the amount entered is a positive value:

flag= True    
while flag:      
    amount = float(input('Enter the price of your product: '))
    if amount <0:
        flag=False
    percent = float(input('Enter the percentage off: '))
    price = amount * percent
    print('You will save $',price,'off!  Your total is: $',amount - price,)

Lastly if you want to run it for a fixed no. of times (Let's say 10) you can go for a for loop:

for i in range(10):      
    amount = float(input('Enter the price of your product: '))
    percent = float(input('Enter the percentage off: '))
    price = amount * percent
    print('You will save $',price,'off!  Your total is: $',amount - price,)

Answer 2

You can do:

while True:
  percent_off_price()