🎉 Hello again, World!

🎯 Learning Target

I can create variables in Python.

👉 Do Now

Fill in as much of this Venn Diagram as you can:

return to Python

Remember this?

Why does it say Let's review Python?

Last year, we used Python 2. This year, we will be using Python 3. There are a few important differences, but for today, the most important is this:

# in PYthon 3, print is a FUNCTION:
print("hello there")
#   ^ parentheses ^

Variables

Store a variable under a name.

Rules for Variable Name

• Contains letters, numbers, and underscores ( _ )
• Cannot start with number
• Cannot contain spaces (you can use underscores used to separate words)
• Cannot use keywords

🔑words

Each programming language has a set of words that are reserved by the language for programmatic purposes.

Some Keywords in Python are : print, False, True, else, if

Rules of 👍 for Variable Names

• Pick names that make sense. Someone besides you should be able to figure out what your variables mean.
• Use underscores to separate words
• Python is CASE SENSITIVE which means Num_marbles = 10 and num_marbles = 10 are different.

Datatypes

⏪ Python Review

👉 Join our repl classroom.

• Create a variable called my_name and store your name in it. Then print the variable.
• Create a variable called multiply that is the product of a negative number and a positive number with a decimal (not a whole number). Print the variable.
• Store a message in a variable. Then print the message.
• Create a variable that stores a Boolean value. Print the variable.
• Create a variable that stores a message. Then store another message in the same variable. Print the message.

🌶

Create a variable that is the quotient of two other variables (hint: you will need to store values in that variable first).

🌶🌶🌶

The operations between boolean values are AND and OR. Create a variable that store the value of True or False and then prints it. Create another value that stores the value of True and False. Print the variable.