Using basic variables

1. Assign values to some variables:

   >>> one = 1

   >>> two = 2

   >>> three = one + two

   >>> hello = "hello"

   >>> world = "world"

   >>> helloworld = hello + " " + world

2. Try printing the values of the variables:

   >>> three

   3

   >>> helloworld

   'hello world'

   Tip: Assigning a value to a variable when it has not been referenced before will also instantiate it. You do not need to define the variable first.