Python – The Programming Language
Python is a popular programming language created by Guido van Rossum, and released in 1991.
Python – Comments
Comments can be used to explain Python code, make the code more readable, or prevent execution when testing code since they are ignored when running.
Python – The Basics of Variables
Variables are containers for storing data values. Python has no command for declaring a variable, instead creating it when you first assign a value to it.
Python – Variable Names
Variables can have a short names (like x and y) or a longer, more descriptive name (like age, firstname, phone_number).
Python – Assigning Multiple Values to Variables
Python allows you to assign values to multiple variables in one line or the same value to multiple variables in one line.
Python – Outputting Variables Using the print() Function
The Python print() function can be used to output the value of variables.
Python – Global Variables and the Global Keyword
Python Global variables can be used both inside and outside of functions. While a variable created inside a function can only be used inside the function.
Python – Working with Data Types
Python has various built-in data types to allow for variables to store different types of data that can do different things.
Python – Working with Numbers
There are three numeric types in Python: int, float, and complex. Variables of numeric types are created when assigned a value.
Python – The Basics of Strings
In Python, strings are surrounded by either single quotation marks, or double quotation marks. “Hello World” is the same as ‘Hello World’.
Python – Slicing Strings
A range of characters can be returned from a string by using the slice syntax.
Python – String Concatenation
To concatenate, or combine, two strings in Python, the + operator is used.
Python – Escaping Characters in a String
To insert characters that will cause problems in a string, an escape character (backslash \ followed by the character you want to insert) is used.
Python – Formatting Strings
To format a string, F-String is used by putting an f in front of the string literal and adding curly brackets {} as placeholders for variables/operations.
Python – Working with Booleans
Booleans represent one of two values: True or False. In Python you can evaluate any expression to determine whether it is True or False.
Python – Utilizing Operators
Python operators are used to perform various operations on variables and values.
Python – Creating and Using Lists
Python lists are used to store multiple items in a single variable.
Python – Accessing List Items
Python list items are indexed and can be accessed by referring to their index number.
Python – Changing List Items
Python list items are accessed and changed by referring to their index number.