Print Statements

Displaying output is essential for debugging, showing results, and communicating with users. Python makes this straightforward with the print function. Basic Output F-Strings for Formatting F-strings (formatted string literals) let you embed variables directly inside strings by prefixing the string with "f" and placing variables in curly braces. The print function accepts multiple arguments separated by commas. By default it inserts a space between each value and ends with a newline character. F-strings evaluate expressions inside the curly braces at runtime, so you can embed calculations like {price * 1.08} directly inside the string. Printing is not the same as returning. A function that prints a value does not make that value available for further computation by the caller. In productio

About This Interactive Section

This section is part of the Python Foundations: Beginner lesson on DataDriven, a free data engineering interview prep platform. Each section includes explanations, worked examples, and hands-on code challenges that execute in real time. SQL queries run against a live PostgreSQL database. Python runs in a sandboxed Docker container. Data modeling problems validate against interactive schema canvases. All content is framed around what data engineering interviewers actually test at companies like Meta, Google, Amazon, Netflix, Stripe, and Databricks.

How DataDriven Lessons Work

DataDriven combines four interview rounds (SQL, Python, Data Modeling, Pipeline Architecture) with adaptive difficulty and spaced repetition. Easy problems get harder as you improve. Weak concepts resurface until you master them. Your readiness score tracks progress across every topic interviewers test. Every lesson section ends with problems you solve by writing and running real code, not by picking multiple-choice answers.