Univ.-ia Student

Sri Ponnada

Schools-Universities & Colleges Academic Executives of Univ-ia Student:
Owner, Sri Ponnada Business classifications
SIC (US 1987) : Then you could also access the second element of mylist, or the element of mylist at the index (which is basically a fancy way to say place/placeholder) 1 in the list.
So, mylist[i] would return 2 since that’s the element at index 1 in mylist.
I know this was a lot to process, so take a second to think about it and to test out how list indices and accessing elements in lists works in the shell. You can make another list with different elements if you’d like, too!
For more info on lists, and other examples check out this.
Let’s continue.
Now that we know how to write a while loop, and how to use lists, let’s go ahead and work on our function. As we learned in the last lesson, it’s always good to plan out how your function should work using pseudocode. Let’s write some up right now!
Pseudocode:
1. Define the function with one argument (alist).
2. Check the length of the list (don’t worry, we’ll talk about how to do that when we start writing the actual function!).
3. Write a while loop that goes through the elements of the list.
4. Get each element from the list and add it to the sum of the previous elements (which we’ll store in a variable called sumsofar).
5. After you’ve gone through all the elements, divide the sum of all the elements by the number of elements in the list.
6. Return the average!
So, let’s define our function. We’re going to call it, averageList. Now, averageList should take one argument (alist) so our function should look a little something like this:
def averageList(alist):
And now, Python should be telling you that the average of the list [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] is 5. 5, which it is indeed.
Test it out!
I know that this tutorial was a bit longer than the others, but that’s just because we covered like three times the material in this one than we did in the other ones. To recap, in this tutorial we learned about:
1. while loops
2. lists
3. built in Python functions (len, float)
4. variables
In the next tutorial, we’ll work with strings and tons of other cool Python things! Here’s to you and your awesome coding abilities! Let me know if you have any questions or comments!
Then, we just return the average.
return average.
To put it all together, check out this that I posted.
You’ll notice that instead of returning the correct average (which is 5. 5) the function returns 5. That’s because we’re doing integer division. We are dividing an integer by an integer, so Python thinks we want an integer as the answer. In Python, decimals are treated differently than regular integer numbers. If we want our function to return the decimal value, or float value as Python calls it, then we have to make one of our values a float. Let’s try making the sumsofar a float. We do this by typing:
float(sumsofar)
It works just like the len function, where you put the list you want to know the length of in between the brackets. Here, you’re putting the integer value that you want to turn into a float.
All we need to do is assign the value we get from this calculation to another variable, which we’ll call average. Simple.
//www.youtube.com/embed/BsekcY04xvQ"/>
Art schools and academies