Explain the Python Functions with explanation

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Anubhav Kumar · Answer

A 
function in Python is a reusable block of code that performs a specific task.
Instead of repeating code, you can put it inside a function and call it whenever you need.
You define a function in Python using the def keyword:
def greet():
    print("Hello, welcome to Python!")
def → keyword to define a functiongreet → function name() → parentheses for parameters (if any): → start of the function blockprint(...) → function body
Calling the function:
greet()
Output:
Hello, welcome to Python!
Function with Parameters
You can pass data into a function using parameters.
def greet_user(name):
    print(f"Hello, {name}!")
Call it:
greet_user("Anna")
greet_user("John")
Output:
Hello, Anna!
Hello, John!
Function with Return Value
Functions can return data using the return keyword.
def add(a, b):
    return a + b
result = add(5, 7)
print(result)   # 12
Default Parameters
If no value is given, default values are used.
def greet_user(name="Guest"):
    print(f"Hello, {name}!")
greet_user()         # Hello, Guest!
greet_user("Alice")  # Hello, Alice!
Multiple Return Values
A function can return multiple values (as a tuple).
def calculate(a, b):
    return a+b, a-b, a*b
sum_, diff, prod = calculate(10, 5)
print(sum_, diff, prod)   # 15 5 50
Keyword Arguments
You can pass arguments in any order by naming them.
def intro(name, age):
    print(f"My name is {name} and I am {age} years old.")
intro(age=25, name="David")
Output:
My name is David and I am 25 years old.
Variable Number of Arguments
*args → allows multiple positional arguments**kwargs → allows multiple keyword arguments
def print_numbers(*args):
    for num in args:
        print(num)
print_numbers(1, 2, 3, 4)
def print_info(**kwargs):
    for key, value in kwargs.items():
        print(f"{key}: {value}")
print_info(name="Sam", age=30, city="NYC")
Lambda Functions (Anonymous Functions)
Short functions written in one line using lambda.
square = lambda x: x * x
print(square(5))  # 25

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Explain the Python Functions with explanation

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1 Answers

Calling the function:

Function with Parameters

Function with Return Value

Default Parameters

Multiple Return Values

Keyword Arguments

Variable Number of Arguments

Lambda Functions (Anonymous Functions)

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