Functions Using Python

In this blog, we will discuss functions in Python Programming.

Introduction 

 

Functions are the piece of code that can be reused within an application at several places. The best benefit of using functions is their reusability. While defining a function, we have to define it only once and we will get different values and different outputs for different places. Functions reduce the size of a program.

 

Different types of function parameters are,

1. With no parameters, 
2. With one parameter, 
3. With two parameters and so on... We can use n number of parameters.

Now, we will see how to write functions in Python.

 

Note

 

For different Python IDEs, we have different ways to execute, however, the result remains the same. For those who are using Visual Studio IDE for Python, the process will be something as follows.

def display(): #function with no arguments
    print("This is an function with no arguments")
    return

display()

def callfun():
    print("This is calling a function into another function")
    display() #calling display() function into call() function
    return

callfun()

def message(name): #function with one argument
    print("Hello, "+name)
    return

message("Kartik")
message("Sai Vinayak")

def message(greeting,name): #function with two arguments
    return greeting+", "+name

msg=message("Hello","Shiv") #message values assigning to msg variable
show=message("Hi","Rahul") #another message values assigning to show variable
print(msg)
print(show)

def add(a,b): #defining a function that calculates the sum of two numbers
    c=int(a)+int(b) #converting two values into integer type
    print(c)
    return

add(5,2)

The code will be like this.

 

 

Then, the output of the program after execution will be like this.

 

 

This is how we can use functions in Python.