我刚刚开始在 Python 中制作一个基本的交互式计算器，但无法弄清楚为什么它不接受给定的输入

Question

num = input("Please enter one number to be added:")
num1 = input("Please enter another number to be added:")
num2 = input("Please enter the third number to be added (if no more numbers are required, type None:")
if num2 == "None" or "NONE" or "none" or "nOne":
    print("One moment please")
    print(num * num1)
else: 
    print("Maximum Numbers Reached")

Above is a sample of the code. The line with num * num1 is the one that has been giving me trouble. I've tried several different variations, including str, int, float, but they won't multiply (or add, subtract, etc...). I've changed everything from the input method to making numbers strings and vice versa. I've tried debugging(didn't work) but nothing makes sense. I made a separate file and ran this:

me = 2
me2 = 3
print(me + me2)

This adds me and me2 just fine. However, the original section just won't work. Is there something wrong here, or do I need to give my brain some recharge time...? Anyway, if you have any ideas, I would appreciate the help. Thanks, Jerry

Answer 1

There are a few issues in the code, refer to the modified code -

check = True # condition for invalid input
while check:
    try:
        num = int(input("Please enter one number to be added:")) # needs to be type int
        num1 = int(input("Please enter another number to be added:")) # needs to be type int

        # not a good approach to accept None inplace of a number
        num2 = int(input("Please enter the third number to be added (if no more numbers are required, Enter 0")) 
    
        check = False 
    except:
        print('Please enter only Integer values')

if not num2:
    print("One moment please")
    print(num + num1) # you are multiplying while saying taking numbers for addition? code has been edited here to addition '+'
else: 
    print("Maximum Numbers Reached")

Answer 2

you had a quite common beginner mistake! basically what you did was instead of

variable = int(input(words))

you put

variable = input(words)

you need the int at the beginning or everything is seen as a string.

Answer 3

When you are inputting numbers like this, the numbers are taken as strings not integers:

Try this:

num1 = int(input("Please enter one number to be added:"))
num2 = int(input("Please enter another number to be added:"))
choice = input("Please enter the third number to be added (if no more numbers are required, type None:").lower()
if choice == 'none':
    print("One moment please")
    print(num1 * num2)
else: 
    print("Maximum Numbers Reached")

Edit: If condition modified