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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]# The sum of ten numbers inserted from the user

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This is my whack at it, I can't wait to hear about it being the wrong big o notation! numbers=[] while len(numbers) < 10: try: chip = int(input('please enter an integer: ')) except ValueError: print('that is not a number, try again') else: numbers.append(chip) print(sum(numbers)) On Thu, Feb 7, 2019 at 10:23 AM Schachner, Joseph < Joseph.Schachner at teledyne.com> wrote: > Well of course that doesn't work. For starters, x is an int or a float > value. After the loop It holds the 10th value. It might hold 432.7 ... > It is not a list. > The default start for range is 0. The stop value, as you already know, is > not part of the range. So I will use range(10). > > In the second loop, I think you thought x would be a list and you I'm sure > you wanted to do > for y in x: > but instead you did > for y in range(x) > and remember x might be a very large number. So the second loop would > loop that many times, and each pass it would assign y (which has first > value of 0 and last value of whatever x-1 is) to sum. Even though its name > is "sum" it is not a sum. After the loop it would hold x-1. You wanted to > do sum += y. Or sum = sum + y. I prefer the former, but that could > reflect my history as a C and C++ programmer. > > And then you printed y, but you really want to print sum (assuming that > sum was actually the sum). > > Putting all of the above together, you want to do this: > > vallist =[] # an empty list, so we can append to it > for n in range(10): > x = input("Insert a number: ") # get 1 number into x > vallist.append(x) # append it to our list > > # Now vallist holds 10 values > > sum = 0 # No need to start sum as a float, in Python if we add a float > to an integer the result will be float. It doesn't matter in the program if > sum is int or float. > for y in vallist: > sum += y > > print( "The sum is: ", sum) > > > > -----Original Message----- > From: ^Bart <gabriele1NOSPAM at hotmail.com> > Sent: Thursday, February 7, 2019 6:30 AM > To: python-list at python.org > Subject: The sum of ten numbers inserted from the user > > I thought something like it but doesn't work... > > for n in range(1, 11): > x = input("Insert a number: ") > > for y in range(x): > sum = y > > print ("The sum is: ",y) > > -- > https://mail.python.org/mailman/listinfo/python-list >

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