JavaScript functions are essential for building dynamic web applications. Here's a breakdown of key concepts and practices:

🧩 Built-in Functions

JavaScript provides numerous built-in functions, such as:

  • Math.pow(base, exponent) for exponentiation
  • Array.map(callback) to transform arrays
  • String.split(separator) for string manipulation

JavaScript Engine

✍️ Custom Functions

Create your own functions using the function keyword:

function greet(name) {
  return `Hello, ${name}!`;
}

Or use arrow functions for concise syntax:

const greet = (name) => `Hello, ${name}!`;

function definition

🚀 ES6+ Features

Modern JavaScript (ES6+) introduces:

  • Arrow Functions: Simplified syntax () => {}
  • Modules: Use export and import for code organization
  • Promises: Handle asynchronous operations

arrow function

📚 Further Reading

For deeper exploration, check our JavaScript Basics tutorial or ES6+ Features Guide.

module export