Unit 3 Sections 1-2 Notes

Variables are abstractions within programs which represent a value
Values can be individual data points or a list/collection that contains many data values
Types of data can include numbers, Booleans (true or false), lists, and strings

A list is made up of elements organized in a specific order
An element is a unique, individual value in a list
A string differs from a list as it is a sequence of characters rather than elements
Data abstraction uses a list by taking specific data elements from a list and organizing into a whole, less complex representation of the values such as a table

To define a variable in Python, type in the variable name (one word) and use the = sign to set it equal to its value
Can be defined using numbers, string, list, or boolean
Strings must have quotations “” around it and lists must be surrounded by square brackets []
THe variable can now be used in functions such as print(‘’)
A dictionary can be created with keys and values in curly brackets {}
Variables can be interchanged with temporary variables (temp function)
They can also be defined with float data type which is used the same as integer