Getting Started with Python: Installing Python and Writing Your First Program (Day f Days of Python)

Last time, we discussed the programmer's role: crafting step-by-step instructions (a program) for computers. Today, we'll explore software types and build our first Python program.

Software and Programs: A Clarification

Before delving into software categories, let's define software. Essentially, it's a collection of programs, data, and instructions working in concert. A railway ticketing system, for instance, is software; it comprises various programs managing ticket information and train/passenger data.

Software Categories

System Software

System software manages hardware and enables application execution. Operating systems (Windows, macOS) and utilities (calculators, terminals) are prime examples. It's the foundation upon which your computer operates.

Application Software

Application software assists users in performing specific tasks. Programs like Chrome, Excel, WhatsApp, or Instagram fall into this category. These can be further classified as:

1. Productivity Software: Word processors, presentation software, spreadsheets, etc.
2. Web Browsers: Chrome, Edge, Firefox, etc.
3. Multimedia Software: VLC Media Player, Adobe Premiere Pro, Photoshop, etc.
4. Communication Software: Outlook, WhatsApp, etc.

...and many more.

Setting Up Python

To begin Python programming, installation is necessary. The following instructions use macOS; Windows users can adapt these steps with minor modifications.

Step 1: Visit python.org and download Python (the specific version is inconsequential). Step 2: Run the installer and follow the on-screen prompts. Step 3: For Windows, ensure "Add Python to PATH" is selected during installation. Step 4: Post-installation, open your terminal (or command prompt for Windows) and type:

For MacOS/Linux:

<code>python3 --version</code>

For Windows:

<code>python --version</code>

The output (version-dependent) should resemble:

<code>Python 3.11.5</code>

This confirms successful installation. If problems persist, refer to the video linked at the top of the blog.

Visual Studio Code Setup

We'll also use Visual Studio Code (VS Code) for Python coding. Installation is straightforward.

Step 1: Go to https://www.php.cn/link/0a4be74a9612071c7992274538563b78 and download the installer (OS-specific). Step 2: Complete the download and follow the installation wizard (accept default settings). Step 3: Verify VS Code's presence in your applications.

Our First Program

Let's create the classic "Hello, World" program.

1. Open VS Code, select 'File' > 'Open Folder,' and choose (or create) an empty folder ("First Program").
2. Create a new file (file icon) named main.py.
3. Add the following code:

<code>python3 --version</code>

This displays "Hello World" on the console. To run: Save (Ctrl S or Cmd S), open the VS Code terminal, and execute:

For Windows:

<code>python --version</code>

For MacOS:

<code>Python 3.11.5</code>

The output should be:

<code>print("Hello World")</code>

Congratulations on your first Python program!

Homework: Program Customization

Modify the program to display "Hello" followed by your name (e.g., "Hello John Doe").

Next Steps

Our next blog will explore Python (and general programming) terminology and create more complex programs.

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