Summing Several Numbers from Any File¶

Create a few more files in Notepad containing some integers separated by some whitespace. Save them in your home directory as 4nums.txt, 5nums.txt, 6nums.txt, etc.

Then write a program that asks the user which file to open. Then it should open that file, and read in and total up all the integers from that file.

You won’t be able to store each number in its own variable anymore. Instead, you’ll need to use a loop, and reuse the same variable over and over. You’ll have to add up the numbers as you go. You’ve done this before.

Name your file sum_many_from_file.py

Which file would you like to read numbers from: 5nums.txt 
Reading numbers from "5nums.txt"
 
1 2 3 4 5
Total is 15

Which file would you like to read numbers from: 8nums.txt 
Reading numbers from "8nums.txt"
 
3 1 4 1 5 9 2 6
Total is 31

This assignment is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.

Creative Commons License

Adapted for Python from Graham Mitchell’s Programming By Doing