Variables, Data Types and Operators

Every useful program keeps track of something: a price, a customer's name, a running total, whether an order has shipped. This track teaches you how Python stores those values in variables and what kinds of values exist. You will work with whole numbers and decimals, find out why 0.1 + 0.2 is not exactly 0.3 and how to round money correctly, slice and clean up text, build neatly aligned reports with f-strings, compare values to get True or False, and convert between types without your program crashing.

It is written for learners who have finished Getting Started with Python and can already run a program, use print() and read a line with input(). Every lesson is built around small, realistic tasks — receipts, invoices, payroll, stock counts, survey answers — and every exercise is checked automatically by running your code. The track ends with a guided mini project: a restaurant bill splitter that reads the bill, adds tax and tip, and prints a clean per-person summary.