Function In Python

Introduction

 

In this article, I will explain the function in Python. A function is a block of code which only runs when it is called. Function blocks begin with the keyword “def” followed by the characteristic name and parentheses (()). The code block within every feature starts off evolved with a colon (): and is indented. Any enter parameters or arguments have to be positioned inside those parentheses. You also can define parameters inside these parentheses.

 

Creating a function

 

“def” keyword is used to create new functions.

 

Syntax 

def function_name(parameters):
    """some code"""
    statement(s)

Example

def my_function():
  print("Hello c# corner")

Calling function

 

To call a function, use the function keyword.

 

Example

def my_function():#function
  print("Hello c# corner")
my_function()

Output

 

 

Arguments

 

Information can be exceeded into functions as arguments. Arguments are unique after the function name, in the parentheses. You can add as many arguments as you want, simply separate them with a comma.

 

Example

def my_function(arg_name):#Arguments name is arg_name.
  print(arg_name + " c# corner")
my_function("hello")
my_function("welcome")
my_function("hi")

Output

 

 

Number of arguments

 

By default, a function must be known as with the right variety of arguments. This means that if your function expects 2 arguments, you must call the function with 2 arguments.

 

Example

def my_function(arg_name1, arg_name2):#2 arguments
  print(arg_name1 + " " +arg_name2)
my_function("hello", "c# corner")#2 must call arguments

Output

 

 

Default parameter value

 

The following example shows a way to use a default parameter value. If we call the function without argument, it makes use of the default value:

 

Example

def my_function(color_name = "yellow"):# Default color_name is yellow.
  print("I like " + color_name+" color")
my_function("red")
my_function("orange")
my_function()#yellow is displayed on the output screen.
my_function("pink")

Output

 

 

Passing a list as an Argument

 

You pass any data type of argument to a function (string, number, list etc.) and it'll be handled because of the same data type in the function.

 

Example

def my_function(number):
  for x in number: #list
    print(x)
number = ["one", "two", "three"]
my_function(number)

Output

 

 

Conclusion

 

In this article, we have seen functions in Python. I hope this article was useful to you. Thanks for reading!