Arduino is smart, but it cannot understand human language like English or Hindi. Instead, it understands a special language called code. Coding is like writing a recipe for a machine—it tells Arduino what to do, when to do it, and how to do it.
For example, you can write a code that says:
“If the temperature is hot, turn the fan ON. If it’s cool, keep it OFF.”
That way, machines become automatic and smart.