Functions
Functions are one of the most important concepts in JavaScript. They allow developers to write reusable, organized, and efficient code. Instead of writing the same code multiple times, you can create a function once and use it whenever needed.
What is a Function?
A function is a block of code designed to perform a specific task. It executes only when it is called or invoked.
Why Use Functions?
Functions offer several advantages:
Code Reusability: Write once and use multiple times.
Better Organization: Divide large programs into smaller, manageable modules.
Easy Maintenance: Update code in one place instead of many.
Improved Readability: Functions make programs easier to understand.
Reduced Code Duplication: Avoid repeating the same logic.
Best Practices
Give functions meaningful names.
Keep each function focused on a single responsibility.
Use parameters instead of relying on global variables.
Return values when appropriate instead of printing directly.
Prefer arrow functions for short callbacks and function declarations for reusable logic.
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