Integer
Domain: Programming Fundamentals
🎯 Motivation
Many programs count things - steps, lives, items in inventory. Integers are whole numbers without decimals.
📋 Concrete Example
lives = 3 or temperature = -5. You can do arithmetic: 3 * 4 = 12.
🔗 Analogy
A counter on a scoreboard - it clicks up or down by whole clicks, never half a click.