Functions

Functions are the block of statements that return the specific task.

Benefits of Using

• Increase Code Readability
• Increase Code Reusability

Snippet:

def function_name(parameters):
    return expression

Types of Functions

• Built-in library function : These are standard deviation in python that are available to use.
• User-defined function : We can create our own functions based on our requirements.

Creating a functions

def func():
    print("Batman")

Calling a Function

def func():
    print("Batman")
func()

Python function with parameters

Snippet:

def function_name(parameter: data_type) -> return_type:
    """Docstring"""
    # body of the function
    return expression

Example :

def add(num1: int, num2:int) -> int:
    """Adding the two integers"""
    num3 = num1+num2
    return num3

num1, num2 = 5,10
ans = add(num1, num2)
print(f"The addition of {num1} and {num2} results {ans}.")

Python function Arguments

def evenOdd(x):
    if x%2 == 0:
        print("Even")
    else:
        print("Odd")

evenOdd(2)
evenOdd(3)

Types of Arguments

• Default Arguments : A default argument is a parameter that assumes a default value if a value is not provided in the function call for that argument.
• Keyword Arguments : They are values that, when passed into a function are identified by specific parameter names.
• Positional Arguments : It is an argument that is passed to a function based on it's position in the argument list.
• Arbitrary Keyword Arguments : It can pass a variable number of arguments to a function using special symbols. There are two special symbols: *args, **kwargs.