Python for Beginners: Install Python and Write Your First Program

Python is a free, easy-to-read programming language and one of the best choices for writing your very first program. In this guide you'll install Python, write a small program that asks for your name and greets you, run it from the terminal, and understand every line.

In short: download Python from python.org, check it with python --version, write your code in a file called hello.py, and run it with python hello.py.

Why Python is a good first language

• Readable: Python code looks close to plain English, without lots of braces and semicolons.
• Versatile: it's used for data analysis, AI, automation, back-end development and everyday scripts.
• Huge community: most questions already have answers, and there's a library for almost everything.
• Free and open source, running on Windows, macOS and Linux.

Still deciding? Read which programming language to learn first.

Step 1: Install Python

On Windows

1. Go to the official site, python.org, and open the Downloads section.
2. Download the latest stable release for Windows.
3. Run the installer and follow the steps. If you see an option to add Python to PATH, enable it; this lets you run Python from any folder in the terminal.

On macOS and Linux

• macOS: download the installer from python.org and install it as usual.
• Linux: most distributions come with Python 3 already installed.

Check that it worked

Open a terminal (PowerShell on Windows, Terminal on macOS and Linux) and type:

python --version

On macOS and Linux, use python3 --version. On Windows, py --version also works. If you see a version number, you're ready.

Step 2: Try Python in the terminal

Type python (or python3) and press Enter. You'll see the >>> prompt, which means Python is waiting for your commands. Try:

>>> 2 + 3
5
>>> print("Hello, Taqnio!")
Hello, Taqnio!

This interactive mode is great for testing small ideas quickly. Type exit() to leave.

Step 3: Write your first program

Now let's put a program in a file so you can save it and run it any time.

1. Create a new folder called python-practice.
2. Open an editor. IDLE comes with Python, or you can use VS Code (see essential VS Code settings and extensions).
3. Create a file called hello.py in that folder and type:

name = input("Your name: ")
for i in range(3):
    print("Hello,", name, i + 1)

4. Save the file, open a terminal in the folder and run it:

python hello.py

The program asks for your name. Type it, press Enter, and it prints a greeting three times:

Understanding the program line by line

• name = input("Your name: "): input shows the text in quotes and waits for the user to type something. Whatever they type is stored in a variable called name.
• for i in range(3):: this is a loop. range(3) produces the numbers 0, 1 and 2, and the loop runs the indented line once for each.
• print("Hello,", name, i + 1): print displays whatever is inside the brackets. We use i + 1 so the count starts at 1 instead of 0.

Notice the indentation (four spaces) before print. In Python, indentation isn't just for looks: it decides which lines belong to the loop.

Try it yourself

The best way to learn is to change the program and watch what happens. Make these edits one at a time, running the program after each:

1. Change range(3) to range(5). How many greetings do you get now?
2. Use name.upper() instead of name inside print. What happened to the name?
3. Add a line that asks for the user's city, and include the city in the greeting.
4. Remove the indentation before print and run it. Read the error message, then put the spaces back.

Making mistakes here is a good thing. Reading and understanding error messages is a core part of learning to code.

Core concepts to learn next

Variables and data types

name = "Sara"      # text (str)
age = 25           # whole number (int)
height = 1.65      # decimal number (float)
is_student = True  # true/false value (bool)

Conditions

age = int(input("Your age: "))
if age >= 18:
    print("Adult")
else:
    print("Under 18")

input always returns text, so we wrap it in int() to turn it into a number before comparing.

Lists

fruits = ["apple", "banana", "orange"]
for fruit in fruits:
    print(fruit)

A list holds several items in one variable, and the loop visits them one by one.

Functions

A function is a named block of code you write once and reuse whenever you need it:

def greet(name):
    return "Hello, " + name + "!"

print(greet("Sara"))
print(greet("Omar"))

def defines the function and return sets the value it gives back. Functions keep your code shorter and easier to change.

Common beginner errors and how to fix them

Error	Usual cause	Fix
SyntaxError	A missing bracket, quote or colon :	Check the line shown and the one before it
IndentationError	Inconsistent indentation	Use four spaces consistently
NameError	A misspelled or undefined variable	Check the spelling; capital letters matter
TypeError	For example, adding text to a number	Convert with int() or str()

If your terminal says the python command isn't recognised, Python probably wasn't added to PATH during installation. Run the installer again and choose to modify the install, or try the py command on Windows.

What to learn after your first program

1. More on functions: default values and splitting a program into small pieces.
2. Dictionaries, to store data as key and value pairs.
3. Reading from and writing to files.
4. A small project, such as a number guessing game or a to-do list.

For a full plan for the coming months, read how to start learning programming from zero. AI tools can help explain errors, as long as you make sure you understand the fix yourself; see how to use AI to help you code. After that, the best free reference is the official Python Tutorial on python.org.