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Hello World Program in Python

Updated on 22/05/20245,867 Views

Introduction

In today’s tech-dominated landscape, Python has carved a niche for itself. Renowned for its versatility and beginner-friendly nature, Python stands tall as a prominent programming language. For every budding programmer, the journey often commences with the iconic “Hello, World!” program in Python. In this extensive article, we embark on a deep dive into numerous approaches to printing the “Hello, World!” program in Python. This exploration includes comprehensive explanations, abundant examples, annotated screenshots, and enlightening images, all meticulously crafted to guide you through every facet of the process.

Overview

The simple yet pivotal “Hello, World!” program in Python is at the heart of learning any programming language. This humble piece of code acts as your inaugural handshake with Python’s syntax and lends a helping hand in setting up your development environment. Within this article, our aim extends beyond merely demonstrating how to print print “hello world”[::-1] output in Python.

Python Program to Print Hello World

Our journey begins as we explore the diverse avenues of printing the "Hello, World!" program in Python. Each method represents a stepping stone in your Python learning voyage. We won't merely provide you with code snippets; we'll also offer insights into when and why a particular method might be your preferred choice.

Using Print() - The Pythonic Way

For a straightforward and quintessentially Pythonic way to showcase the "Hello, World!" program in Python, we turn to the trusty print() function to print(hello world in Python using a function). Observe this code snippet for a glimpse into its simplicity:

print("Hello, World!")

The print() function is foundational, and mastering it will serve you well in your Python journey. It accepts one or more arguments, making it versatile enough to display strings, variables, or even complex expressions as output.

Using sys - Fine-tuning Your Output

Another approach to printing "Hello, World!" is by utilizing the sys module, specifically the sys. stdout.write() method. While this method may not be as commonly used as print(), it offers finer control over the output stream. Here's how it's done:

import sys 
sys. stdout.write("Hello, World!\n")

Here, we dive into the code snippet. Initially, we import the sys module, followed by the use of sys.stdout.write() to inscribe the "Hello, World!" message onto the standard output—usually the console. It's crucial not to overlook the inclusion of the newline character (\n) for impeccable formatting.

Using a String Variable - A Versatile Approach

Python's flexibility allows you to store text in variables. You can stow away "Hello, World!" in a variable and subsequently print it. Take a look at this Python code example:

message = "Hello, World!" 
print(message)

This approach proves especially beneficial when you intend to reuse the message throughout your code. By storing it in a variable, you can effortlessly modify the message, and those alterations will propagate throughout the code.

Using F-strings - The Modern Pythonic Way

F-strings (formatted strings) represent a contemporary and convenient way to format strings in Python. They can be employed to print "Hello, World!" as follows:

message = "Hello, World!" 
print(f"{message}")

Introduced in Python 3.6, F-strings provide a concise and highly readable way to format strings. They empower you to embed expressions, variables, or function calls within strings, resulting in dynamic and versatile output.

Using Commented Code - An Educational Approach

In some learning environments, educators might introduce the "Hello, World!" program in Python by providing a commented code that explains each step. While this method doesn't directly display the message, it serves as an educational tool. Here's an example:

# Define the message 
message = "Hello, World!" 
# Print the message 
print(message)

Commented code provides valuable insights into Python syntax and how code is structured. It encourages students to understand and learn by dissecting each line.

Using Libraries and Frameworks - Real-world Application

In the realm of real-world applications, "Hello, World!" is a simple Python program that seldom appears in its purest form. Instead, you encounter libraries and frameworks brimming with robust features capable of constructing intricate applications. For example, consider the Flask web framework, which allows you to fashion a web-based "Hello, World!" application.

from flask import Flask 
app = Flask(__name__) 
@app.route('/') 
def hello_world(): 
return'Hello, World!' 
if __name__ == '__main__': 
app.run()

This example serves as a testament to how the "Hello, World!" concept effortlessly extends its reach into crafting web applications, APIs, and an array of other possibilities, all made feasible by Python's expansive ecosystem.

Steps for Printing Hello Python

Before we delve into the various methods of printing "Hello, Python," let's set up our Python environment. Follow these steps to ensure you're ready to explore the code examples:

Step 1: Install Python

Before diving into Python wonders, ensure you have Python installed. Head over to the official Python website at python.org and obtain the latest version tailored to your operating system. Follow the installation instructions meticulously detailed there.

Step 2: Open a Text Editor or IDE

While Python code can materialize in any text editor, we advocate for the elevated experience offered by an Integrated Development Environment (IDE). Choices abound, with Visual Studio Code, PyCharm, and Jupyter Notebook standing as popular contenders. Opt for your favored IDE and proceed with the installation.

Step 3: Create a New Python File

With your chosen IDE at the helm, forge a new Python file. Bestow upon it the .py extension, akin to naming it hello_python.py, for instance.

Step 4: Start Coding

Now, you're ready to explore different ways to print "Hello, World!" in Python. Let's proceed with the first method using the print() function.

Using Print()

Now, brace yourself for a rendezvous with the print() function—an embodiment of simplicity and Pythonic elegance, ready to unfurl "Hello, World!" upon your console canvas.

Example 1: Basic Usage

Here's a simple code snippet that uses print() to display the message:

print("Hello, World!")

In this code, we call the print() function with the string "Hello, World!" as its argument. When you run this code, the message is displayed on the console.

Example 2: Printing Multiple Items

You can use print() to display multiple items by separating them with commas:

name = "Python" 
version = 3.9 
print("Hello,", name, "Version", version)

In this code, we create two variables, name and version, and then use print() to display a message that combines these variables and strings.

Example 3: Formatting Output

You can format the output using special characters like newline (\n) and tab (\t). Here's an example:

print("Hello,\nWorld!\tWelcome")

In this code, we use \n to insert a new line and \t to insert a tab, resulting in formatted output.

Using sys

The sys module is an access portal to Python's system-specific parameters and functions. It navigates the standard input and output streams, typically venturing into more complex territory than the realm of simple "Hello, World!" messages. Yet, grasping its workings remains an essential aspect of Python mastery.

Example: Using sys. stdout.write()

You can utilize the sys. stdout.write() method to write text to the standard output (usually the console). Here's an example:

import sys message = "Hello, World!" 
sys.stdout.write(message "\n")

As you plunge into the code, note our union with the sys module, birthing the variable message destined to bear our greeting. Its deployment is in tandem with sys. stdout.write() ensures that our message finds its place on the console canvas, where a newline character (\n) ensures pristine formatting.

Using a String Variable

But Python's prowess stretches beyond mere syntax; it is a canvas for creativity and dynamism. We venture into a realm where text can be wrapped in variables, awaiting the moment of expression. This section unravels the art of storing "Hello, World!" within a variable, a handy technique for text with a dynamic purpose.

Example: Storing the Message in a Variable

message = "Hello, World!" 
print(message)

Our code tapestry weaves a narrative, encapsulating the birth of a variable named message. Its soul resonates with the string "Hello, World!". Herein lies the power of the print() function, summoned to unfurl the message's essence onto the canvas of the console. Such an approach, you'll find, lends itself splendidly to scenarios where the message deserves multiple cameos throughout your code.

Using F-strings

F-strings (formatted strings) represent a modern and convenient way to format strings in Python. They allow you to embed expressions, variables, or function calls within strings, resulting in dynamic and versatile output.

Example: Using an F-string to Print "Hello, World!"

name = "Python" version = 3.9 print(f"Hello, {name} Version {version}!")

In this code, we create variables name and version and then use an F-string to format the output. The expressions inside {} are evaluated and substituted into the string. F-strings offer a concise and readable way to create dynamic strings.

Conclusion

The "Hello, World!" program in Python, despite its apparent simplicity, acts as an entry point to Python's expansive programming universe. Throughout this article, we've ventured beyond the conventional "Hello, World!" example, delving into Python's multifaceted applications. From basic salutations to the realms of data analysis, web development, automation, collaborative coding, data science, and even game creation, Python shines.

Python's adaptability, clear syntax, and a wealth of libraries and frameworks position it as a formidable instrument across diverse fields. Whether you're a novice taking your initial programming strides or a seasoned developer tackling intricate projects, Python remains a steadfast asset in your arsenal.

As you navigate further along your Python odyssey, new horizons and challenges await. Keep in mind that "Hello, World!" is just the threshold, marking the commencement of an exhilarating expedition through the Python programming cosmos. Armed with curiosity, tenacity, and a dash of ingenuity, you're poised to achieve remarkable feats with Python. Enjoy your coding journey!

FAQs

  1. What is the purpose of the "Hello, World!" program in Python?

The "Hello, World!" program serves as a humble starting point for beginners, facilitating familiarity with Python's syntax and confirming the correct setup of their development environment. It provides immediate feedback, ensuring that Python is correctly installed and operational.

  1. Can I use any of these methods in Python 2?

Yes, these methods are compatible with both Python 2 and Python 3. However, it's imperative to note that Python 2 has reached its end of life and is no longer supported. For all new projects, it is strongly recommended to use Python 3.

  1. Are there any alternative ways to print "Hello, World!" in Python?

While the methods we've discussed are some of the most common, Python offers a multitude of alternative approaches to achieve the same outcome. These approaches range from using the file argument with print(), redirecting output to a file, to even crafting custom classes for output management.

Pavan

PAVAN VADAPALLI

Director of Engineering

Director of Engineering @ upGrad. Motivated to leverage technology to solve problems. Seasoned leader for startups and fast moving orgs. Working … Read More

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