Loops Challenge Question

For this challenge question, you are going to write three different functions that perform the same act, but in different ways!

Part 0. Setup

Start by opening your workspace in Visual Studio. Right click on the “lessons” folder and select “add file”. Your file will be named sum.py.

Set up your document by adding the docstring: """Summing the elements of a list using different loops""" and initializing the __author__ variable with your PID.

Part 1. w_sum()

Now, write a function called w_sum that takes as input a list of floats vals: list[float], and returns the sum of all elements. Loop through the list using a while loop.

For example, w_sum([1.1, 0.9, 1.0]) should compute 1.1 + 0.9 + 1.0 and return the simplified value 3.0.

The sum of an empty list w_sum([]) should return 0.0.

Part 2. f_sum()

Now, write a function called f_sum that performs the same way as w_sum, calculating the sum of all elements in vals but uses a for ... in ... loop. (Do NOT use the range keyword for this part!)

Part 3. f_range_sum()

Finally, write a function called f_range_sum that performs the same way as the two previous functions, calculating the sum of all elements in vals but uses a for ... in range(...) loop.

Submission

Create a .zip file by running the following command in your terminal:

python -m tools.submission lessons/sum.py

Then, drag and drop that .zip file into Gradescope!