Python Def Statement

Python def statement

Created By: chatGPT

In Python, a function is defined using the def statement. This allows you to encapsulate a block of code for reuse. The syntax for a function definition is as follows:

def function_name(parameters):
    # code block
    return value

Parameters are optional and can be used to pass values into the function. The function can also return a value using the return statement. Here’s a simple example of a function that adds two numbers:

def add_numbers(a, b):
    return a + b

To call the function, simply use the function name followed by parentheses containing any arguments. For example:

result = add_numbers(5, 3)
print(result)  # Output: 8

Functions can also have default parameter values. This allows the function to be called with fewer arguments than defined. Here’s an example:

def greet(name, greeting='Hello'):
    return f'{greeting}, {name}!'

# Calling with default greeting
print(greet('Alice'))  # Output: Hello, Alice!

Python also supports variable-length arguments using *args and **kwargs. This allows you to pass an arbitrary number of positional and keyword arguments, respectively.

def variable_args(*args, **kwargs):
    print(args)
    print(kwargs)

variable_args(1, 2, 3, name='Alice', age=30)

It's important to follow indentation rules in Python, as it uses indentation to define blocks of code, rather than braces or keywords. The typical convention is to use four spaces for each level of indentation.

def example_function():
    print('This is an example function.')