Python is a high-level, interpreted, and general-purpose programming language designed with an emphasis on code readability and simplicity. It was created by Guido van Rossum and first released in 1991.
Python is widely used in:
Python code is written in a form close to human language (English-like syntax), making it easy to read and write. The interpreter handles the conversion to machine-level instructions.
Python is an interpreted language. This means the Python interpreter reads and executes the source code line-by-line at runtime, rather than compiling the entire program into machine code before execution.
Advantage: Errors are reported immediately at the line where they occur, making debugging easier.
Python can be used to build almost any type of application — from simple scripts to complex web applications and AI systems.
Python programs can run on any operating system (Windows, macOS, Linux) as long as the Python interpreter is installed. This makes Python highly portable.
Python comes with a large standard library of pre-built modules and functions that allow programmers to perform many tasks (file handling, math, networking, etc.) without installing external packages.
Python is case-sensitive. This means uppercase and lowercase letters are treated as different characters.
Example:
Variable = 10
variable = 20
print(Variable) # Output: 10
print(variable) # Output: 20
Here, Variable and variable are two different identifiers.
Unlike many programming languages that use curly braces {} to define blocks of code, Python uses indentation (spaces or tabs at the beginning of a line).
Example:
if 5 > 3:
print("Five is greater") # This line is indented — it belongs to the if block
print("This is outside the if block")
Incorrect indentation will cause an IndentationError.
Comments are lines in the code that are not executed by the interpreter. They are used to explain the code.
# This is a single-line comment
print("Hello, World!") # This prints a greeting
| Feature | Benefit |
|---|---|
| Simple syntax | Easy to learn for beginners |
| Interpreted | Immediate error feedback |
| Large library | Less code to write |
| Portable | Runs on any OS |
| Community | Huge support and resources |
Python's simplicity and power make it one of the most popular programming languages in the world, used by beginners and professionals alike.