🎯 MILESTONE 1 - Interactive command line dialog

What You’ll Build: An interactive menu system with user input, calculations, and conditional logic

Core Concepts:

• Variables and data types (strings, integers, floats, booleans)
• User input/output with input() and print()
• String formatting (f-strings, concatenation)
• Arithmetic and comparison operators
• Control flows (if/elif/else, while loops)
• Input validation patterns
• Menu system patterns

Programming Patterns:

• Input → Process → Output
• Menu loop pattern
• Input validation loop
• Sentinel loop pattern

By the End: You’ll have an interactive program that greets users, performs calculations, validates input, and provides dynamic feedback based on performance metrics.