在 python 中使用验证循环计算运行总数

Question

I am new to python and trying to calculate a running total while validating the user input. If the user inputs invalid data I am showing an error and asking the user to input the correct data. My issue is I am unable to determine how to calculate only the valid data input from the user instead of all values.

# This program calculates the sum of a series
# of numbers entered by the user.

#Initialize an accumulator variable.
total = 0

#Request max value from user.
max_value = int(input("Enter a value for the maximum number: "))

#Request user to enter value between 1 and max value.
number = int(input("Enter a number between 1 and " + str(max_value) + " or negative number to end: "))

#Calculate total of user input values.
while number > 0:
      total = total + number
      number = int(input("Enter a number between 1 and " + str(max_value) + " or negative number to end:"))

#Display error if user entered invalid value.
    if number == 0 or number > max_value:
        print("Number entered is invalid!")

#Print sum of valid user input data. 
else:
    print("Sum of all valid numbers you entered:", total)

Answer 1

I can see that you have added too much unnecessary code and this is a very bad practice in python. I believe that this is the answer you are looking for: f"" = is called a formatted string and the while loop is unnecessary so after that, you should import sys and use the exit function under a while loop and exit under a for loop

from sys import exit as exit1


while True:
    max_value = int(input("Enter a value for the maximum number: "))
    if max_value<0:
        break
    number = int(input(f"Enter a number between 1 and {max_value} or negative number to end: "))
    total = max_value + number

    if number == 0 or number > max_value:
        print("Number entered is invalid!")
    else:
        print("Sum of all valid numbers you entered:", total)

Answer 2

So after reevaluating the code I wrote the first time I came up with the below and it functions as I would like. For a beginner that has only learned three chapters I think it is good. Current knowledge base is Input, Processing, Output, Decision Structures, Boolean Logic, and Repetition Structures.

 # This program calculates the sum of a series
 # of numbers entered by the user.

 #Initialize an accumulator variable.
 total = 0

 # Request max value from user.
 max_value = int(input("Enter a value for the maximum number: "))

 #Request number between 1 and max value.
 number = int(input("Enter a number between 1 and " + str(max_value) + " or negative 
 number to end: "))

 #Validate the user input is between 1 and max value
 # if so accumulate the number.
 while number >= 0:
     if number > 0 and number <= max_value:
        total = total + number

     elif number == 0 or number > max_value:
         print("Number entered is invalid!")

     number = int(input("Enter a number between 1 and " + str(max_value) + " or negative number to end: "))

 #Once user select a negative number, print total.
 else:
     print("Sum of all valid numbers you entered:", total)