Welcome to Python!
Python is a high-level, interpreted programming language known for its simplicity and readability. It supports multiple programming paradigms including procedural, object-oriented, and functional programming.
Python's extensive standard library and third-party modules make it suitable for a wide range of applications, from web development to data analysis and machine learning.
Variables are containers used to store data values. They provide a way to label and refer to memory locations in a program. In Python, variables are dynamically typed, meaning you don't need to declare the type of a variable before using it.
Variables can hold different types of data such as integers, floats, strings, lists, tuples, dictionaries, etc.
In Python, declaring variables is straightforward. You can assign a value to a variable using the assignment operator '='. Variable names can contain letters, numbers, and underscores but cannot start with a number.
# Example of declaring variables
x = 5
name = John
is_valid = True
# Variable reassignment
x = 10
name = "Alice"
# Variables of different types
age = 25
height = 5.9
city = "New York"
Constants are variables whose values should not be altered during the execution of the program. While Python doesn't have built-in constant types, it is a convention to use uppercase variable names for constants to indicate their immutability.
Constants are typically used for values such as mathematical constants (e.g., pi), configuration settings, or any value that should remain fixed throughout the execution of a program.
# Example of declaring constants
PI = 3.14159
MAX_CONNECTIONS = 100
# Example of using constants for configuration settings
DATABASE_URL = "mysql://username:password@localhost:3306/mydatabase"
API_KEY = "your_api_key_here"
- Variables in Python are case-sensitive.
- Python allows variable reassignment, meaning you can change the value of a variable during the execution of a program.
- It's good practice to use descriptive names for variables to improve code readability.
- Python supports dynamic typing, which means you can reassign variables to different data types.
- Variables can be of different types such as integers, floats, strings, lists, tuples, dictionaries, etc.
This project was completed for FreeCodeCamp's responsive web design course
This document was coded using Visual Code Studios by Ryley Croucher and the contents was provided by OpenAI