Python Class, Week 2!
Here's the review of our second class. The class powerpoint is linked below:
Some more Basics:
In Python we use these math operators for simple equations.
We also use these comparison Operators to compare different objects:
Not Equal: !=
Greater than/lesser than: < or >
Greater/Lesser than or equal to: <= or >=
Here are Python's basic data types:
Integer/whole number: int
String (text): str
Float (decimal number): float
Boolean (true/false): bool
A list is a data structure that allows us to group data together and assign them to a variable.
In other programming languages such as Java, a list is known as an array
We use square brackets ('[' and ']') to define a list, and separate the elements or items in our list using commas.
names = ["Rachael", "Mana", "Minseo"]
We can enter any type of data in our list:
example_list = [42, "hello, world!", 3.0, True]
...and we can print a list like this:
Accessing Items in a List:
- lists use an index to refer to a specific position of time
- Index starts at 0, so the index of the last item will be 1 less than the total number of items in your list
- To access an element of a list using index, we write: list[index]
names #This should print 'Minseo' example_list #This should print 42
Looping through a List:
Programmers often use for-loops and while loops with lists. You can iterate (go over the range of items in a list and perform the same task) through the list using these loops. Let's take a look at an example:
scores = [96, 93, 84, 90, 98, 81] print("Here are your scores for the term:") for score in scores: print(score)
For Practice... go to https://codingbat.com/python. There you can practice basic syntax and lists!
If you need anything, don't hesitate to reach out!
Contact us with any questions:
Mana Vale: firstname.lastname@example.org
Rachael Kim: email@example.com
Kaitlyn Flowers: firstname.lastname@example.org
Celine Tan: email@example.com
Joey Dong: firstname.lastname@example.org
Molly Pate: email@example.com