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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)

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