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Operator Precedence in Python

Introduction
Setting Up Your Python Environment
Installing Python and PyCharm IDE Creating and Running Your First Python Program
Python Data Types
Numeric Types String Types Boolean Types None Type
Operators and Expressions
Arithmetic Operators Comparison Operators Logical Operators Bitwise Operators Assignment Operators Operator Precedence
Control Flow Statements
Conditional Statements Loops Break and Continue Statements Exception Handling
Functions and Modules
Defining and Calling Functions Function Arguments and Return Values Lambda Functions Modules and Packages
Python Data Structures
Lists Tuples Dictionaries Sets Arrays
ObjectOriented Programming in Python
Classes and Objects Attributes and Methods Inheritance and Polymorphism Abstract Classes and Interfaces
File Handling
Opening and Closing Files Reading and Writing Text Files Reading and Writing Binary Files CSV Files
Regular Expressions
Basic Regular Expressions and Metacharacters Anchors and Quantifiers Grouping and Capturing Lookarounds
Datetime and Timezones
Date and Time Objects Date and Time Formatting Timezone and Daylight Saving Time Handling
Debugging and Testing
Debugging Techniques Debugging Tools in PyCharm Unit Testing with PyTest
Web Scraping with Python
Requesting Data with urllib Parsing HTML with Beautiful Soup Extracting and Storing Data
Database Handling with Python
Connecting to Databases Performing CRUD Operations Database Access with ORM (ObjectRelational Mapping)
Introduction to Data Science with Python
NumPy Pandas Matplotlib ScikitLearn
GUI Programming with Python
Creating GUI Applications GUI Toolkits (Tkinter, PyQt, wxWidgets)
Network Programming with Python
Socket Programming Creating and Running a Simple Web Server Connecting to APIs
Best Practices and Tips
Python Coding Standards Code Organization Writing Efficient Code Tips and Tricks for Python Development
Conclusion and Next Steps.

Operator Precedence

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In Python, operator precedence determines the order in which operations are performed in an expression.

Like in mathematical expressions, Python has a specified order of precedence for its operators:
  1. Parentheses: Expressions inside parentheses are always evaluated first.
  1. Exponentiation: Exponential expressions are evaluated next.
  1. Multiplication, Division, and Modulus: These expressions are evaluated next, in the order of left to right.
  1. Addition and Subtraction: These expressions are evaluated next, in the order of left to right.
  1. Comparison Operators: These operators (e.g. <, >, <=, >=) compare the values of two expressions and provide a Boolean value as output.
  1. Logical Operators: These operators (e.g. and, or, not) evaluate Boolean expressions and provide a Boolean value as output.
  1. Assignment Operators: These operators (e.g. =, +=, -=) are used to assign values to variables.

For example, in the expression (4 + 5) * 2, the parentheses are evaluated first, resulting in 9 * 2, which equals 18. Similarly, in the expression 2 * 3 + 4, the multiplication is evaluated first, resulting in 6 + 4, which equals 10.

It is important to understand operator precedence in Python in order to avoid errors and ensure that expressions are evaluated correctly. It can also be useful to use parentheses to explicitly indicate the order of operations when expressions become more complex.

March 25, 2023

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