Function Arguments in Python

In this tutorial, we will learn about the Function Arguments in Python. Its types, and how to use them with the help of examples.

Function is a Sub-program within program that perform specific operation within program. After performing an operation function returns a value which may the result of operation.

Arguments are the values passe inside the parenthesis of the function. A function can have any number of arguments separated by a comma. Python supports various types of arguments.

Types of Function Arguments in Python

There are four types of argument

• Default argument
• Keyword argument
• Required argument
• Variable-length argument

Default Argument

Default argument has a default value. It will use in the absence of Passing Values at the time of calling.

The Example of default arguments function

def num( x = 5,  y = 25):
    sum = x + y
    print('Sum:', sum)
    
num(x = 8)
num(15, 22)
num()

Example of default arguments function in Python

Let’s run the code

Keyword Argument

Keyword argument is use to pass the value with name of variable so that we can pass values without bothering the sequence of parameters.

The Example of Keyword Argument

def display_info(student_name, father_name):
    print('Student Name:', student_name)
    print('Father Name:', father_name)

display_info(father_name = 'Roshan Kumar', student_name = 'Anu Raj')

Example of Keyword Argument

Let’s run the code

Required Argument

Required arguments are the mandatory arguments of a function. These argument values must be pass in correct number and order during function call.

The Example of Required Argument

def key( company_name): 
 print ("Company Name: ", company_name)
 
key("Basic Engineer")

Example of Required Argument

Let’s run the code

Variable-length Argument

In this we can pass arguments in different numbers of arguments in different function call. It will handle all the arguments using pointer.

There are two special symbols:

• *args (Non-Keyword Arguments)
• **kwargs (Keyword Arguments)

Non Keyword Argument

The Example of *args (Non-Keyword Arguments)

# *args arguments
def key(*argv):
	for arg in argv:
		print(arg)


key('Hello', 'Student', 'Basic', 'Engineer')

Example of *args (Non-Keyword Arguments)

Let’s run the code

Keyword Arguments

Example of **kwargs (Keyword Arguments)

# *kwargs arguments
def key(**kwargs):
	for key, value in kwargs.items():
		print("%s = %s" % (key, value))


# Driver code
key(first='Hello', mid='Student', last='Basicengineer')

Example of **kwargs (Keyword Arguments)

Let’s run the code

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