Writing and executing program in python

Python Hello World Example: A Beginner’s Guide to Writing and Executing Your First Program

Learn how to write and execute a «Hello World» program in Python with this beginner’s guide. Discover the importance of learning Python and its popularity in various fields.

• Introduction
• What is a “Hello World” program in Python?
• Hello World in Python
• Programming Modes in Python
• Creating a “Hello World” Program in Python
• Executing a “Hello World” Program in Python
• Importance of Learning Python
• Other Python Hello World code examples
• Conclusion
• How to print Hello, World in Python 5 times?
• How to code Hello, World?

Welcome to this beginner’s guide on how to write and execute a “Hello World” program using Python. In this post, we will cover all the essential aspects of the “Hello World” program in Python, including its definition, programming modes, creating and executing the program, and the importance of learning Python.

Introduction

The “Hello World” program is a simple program that displays the message “Hello, World!” on the screen. It’s often the first program that beginners learn to write and execute when starting to learn a new programming language. In this post, we will guide you through writing and executing your first “Hello World” program in Python, which is an excellent language to start learning programming.

What is a “Hello World” program in Python?

A “Hello, World!” program in Python is a simple program that prints the message “Hello, World!” on the screen. In Python, you can print a message to the screen using the built-in print() function. Here’s an example of a “Hello, World!” program in Python:

Hello World in Python

Stay in the loop INFINITELY: https://snu.socratica.com/python Python is a clean and powerful Duration: 2:47

Programming Modes in Python

Python has two programming modes: interactive mode and script mode. Interactive mode allows you to enter Python commands one at a time and see the result immediately. Script mode, on the other hand, allows you to write your code in a file and execute it as a script.

Interactive mode programming is useful when testing small code snippets or trying out new ideas. It is not suitable for writing complex programs. In contrast, script mode programming is essential when writing more extensive programs.

Creating a “Hello World” Program in Python

Before we start writing the “Hello World” program, we need to set up our development environment. We will be using VS Code, an excellent ide for python development . Here’s how to set it up:

1. Download and install Python from the official website.
2. Download and install VS Code from the official website.
3. Open VS Code and install the Python extension.

Once you have set up your development environment, it’s time to create your first Python project. Follow these steps:

1. Open VS Code and click on “File” > “New Folder” to create a new folder for your project.
2. Click on “File” > “Open Folder” and select the folder you just created.
3. Click on “File” > “New File” to create a new file.
4. Save the file with a “.py” extension. For example, “hello_world.py”.

Now that you have created a new Python file, it’s time to write the “Hello World” program. Here’s the code:

Congratulations! You have just written your first “Hello World” program in Python.

Executing a “Hello World” Program in Python

Now that you have written the “Hello World” program, it’s time to execute it. There are two ways to execute a Python program: using the command prompt and using an IDE like VS Code.

Using the Command Prompt

To execute the program using the command prompt, follow these steps:

1. Open the command prompt.
2. Navigate to the folder where you saved the “hello_world.py” file.
3. Type “python hello_world.py” and press enter.

The program should run, and you should see the “Hello, World!” message printed on the screen.

Using an IDE like VS Code

To execute the program using VS Code, follow these steps:

1. Open the “hello_world.py” file in VS Code.
2. Click on “Run” > “Start Debugging” or press F5.
3. The program should run, and you should see the “Hello, World!” message printed on the screen.

Importance of Learning Python

Python is a high-level programming language that is easy to learn and use. It is widely used in various fields like web development, scientific computing, data analysis, and artificial intelligence.

• It’s easy to learn and use.
• It has a vast library of modules and packages for various applications.
• It’s widely used in various fields, making it a valuable skill to have.
• It has a large community of developers, making it easy to get help and support.

Other Python Hello World code examples

In Python , hello world python code example

print("Hello World") #prints Hello World to the console

In Python , for example, hello world python code example

# Your first program will grant you good luck in your python journey! Here it is:print("Hello world!")

In Python , in particular, hello world in python code sample

# Using single and double quotations print("Hello, World") print('Hello, World')# All the best for your programming journey!

In Python , python hello world code sample

In Python , for instance, python hello world program code example

def helloworld(): print("Hello World")helloworld()

In Python , in particular, python hello world code sample

In Python as proof, hello world in python code sample

# the normal way! print("Hello, World!") # Different way import __hello__ # run the program

In Python as proof, python hello world code example

hello = "Hello world!" print(hello)

In Python , in particular, hello world python code sample

print("Hello World") #Beginner python programmer I see

In Python , python hello world code example

print('Hello world') # This can work with single or double quotations 

Conclusion

In this post, we covered all the essential aspects of the “Hello World” program in Python. We defined the program, explained programming modes, and provided a step-by-step guide to creating and executing the program. We also highlighted the importance of learning Python and its benefits.

We encourage you to practice and experiment with the “Hello World” program in Python and continue learning and exploring the language. Python is a powerful language with endless possibilities, and we hope this post has given you a solid foundation to start your Python journey.

Источник

Creating Python Programs

After reading the Python tutorial so far, you should have a basic understanding of Python and the REPL. Even though the latter can be very useful, you probably noticed in the last example that the REPL has its limits. It’s nice for quick experiments, but:

• It’s really hard to enter more than a few lines
• It’s hard to go back to previous lines
• There’s no syntax highlighting
• We can’t store our programs and re-use them later on

If we want to store our programs and use a decent editor, we need to simply:

No worries, we’ll go over it step by step.

1. Create a Python file

We need to create a so-called plain text file, meaning there’s nothing special about this file. It’s just text. Sounds simple, but it’s not. For example, if you start Word or a similar program, enter some text, and save it, you don’t end up with plain text.

Text processing software like Word will add all kinds of extra codes to define the markup, allow for images to be included, etcetera. It looks a little like HTML, in fact, which is used to create websites (see this HTML tutorial for an introduction).

So what should we use?

If you’re on Windows, try Notepad. It’s a plain text editor that does not add any markup. It’s a horrible way to create Python programs, but we’ll explore better options later on.

If you’re on Linux, you could open a terminal and try a text editor like nano or vim (the last one is hard to use if you haven’t read the manual, though). Many Linux installations include a GUI text editor too, like gedit.

MacOS comes with a program called TextEdit.

2. Enter the code

Now it’s time to enter some code. We’ll keep it super simple for now. Just enter something like:

On Windows, it should look like this:

3. Save the file

Save the file. The most important thing to look out for is the file extension. Python files end with the .py extension. Call your file helloworld.py . In Notepad, you need to click the dropdown list called ‘Save as type’ and select All files (*.* ):

4. Execute a Python program file

Now that you saved the file, we can execute it. There are two options, and most often you want to go for option one:

1. Open a terminal or command prompt, go to the file’s directory, and execute it with the python3 command
2. Find the file with Windows explorer, right click, open with ‘Python 3.X’.

If you try option two, you’ll find out that the program flashes on the screen shortly, and you won’t see the output because the window closes itself directly after the text is printed to the screen. So now you know why you want option one! If you create more advanced programs that keep running instead of quitting directly, option two can be an OK way to start a Python script.

Note: I’ll demonstrate using Windows, but this works the same on Linux and MacOS. Instead of opening a Command Prompt or Windows Terminal, you open a MacOS terminal or Linux terminal.

1. Open the start menu and type ‘Command Prompt.’ It might be named differently if your OS is configured with another language than English. Hint: Create a new profile with English settings. It may be helpful because most examples on the web and in books assume English settings.
2. cd to the directory where you stored your file. In my case, it’s C:\python.land
3. Run the program with the command python3 helloworld.py

The output should look like this:

Congrats, You did it. You wrote a Python program, saved it to a file, and executed it like a boss! Don’t celebrate too hard, though. You don’t want to develop Python software using Notepad or other simple text editors. What you really want is a Python IDE: an Integrated Development Environment. Sounds scary, but it’s not!

Get certified with our courses

Our premium courses offer a superior user experience with small, easy-to-digest lessons, progress tracking, quizzes to test your knowledge, and practice sessions. Each course will earn you a downloadable course certificate.

Learn more

This article is part of my Python tutorial. You can head over to the start of the tutorial here. You can navigate this tutorial using the buttons at the top and bottom of the articles. To get an overview of all articles in the tutorial, please use the fold-out menu at the top.

If you liked this article, you might also like to read the following articles:

Leave a Comment Cancel reply

You must be logged in to post a comment.

You are browsing the free Python tutorial. Make sure to check out my full Python courses as well.

Subscribe to my newsletter for Python news, tips, and tricks!

Источник