Python · Lesson 1 of 9

Python introduction

What Python is used for, running code and the print() function.

Python is a general-purpose language known for code that reads almost like English. Teams in Kerala's IT parks use it for backend services (Django, FastAPI), data analysis (pandas), automation scripts, testing and machine learning.

Your first program

print() shows a value on the screen. Text goes inside quotes; numbers don't need them. Python runs your file from top to bottom, one line at a time.

Comments and indentation

Anything after # is a comment — Python ignores it. Unlike many languages, Python uses indentation (spaces at the start of a line) to group code, so be consistent: four spaces per level is the convention.

Try it yourself

Code editor

Press Run to see the output.

Edit and press Run (or Ctrl/⌘ + Enter). Python runs in your browser — the first run downloads the Python engine and takes a few seconds.

Key points

print() displays output.
# starts a comment.
Indentation is part of Python's syntax — use 4 spaces.

Quick check

Which symbol starts a comment in Python?

// # <!-- --

Practice task

Change the program so it prints your name on one line and the city you want to work in on the next.

Interview corner

Why is Python popular for beginners and companies alike?

Its syntax is short and readable, it has a huge standard library and third-party packages, and it is used across web, data, automation and AI — so one language covers many jobs.

Is Python compiled or interpreted?

CPython compiles source to bytecode and then interprets that bytecode on a virtual machine. In everyday terms it is called an interpreted language because you run the source directly without a separate build step.