The Power of Functions in JavaScript

Functions are fundamental building blocks in JavaScript that allow us to write reusable and modular code. They are a way to encapsulate a piece of code and execute it whenever needed. In this article, we will explore the usage of functions in JavaScript with examples.

Defining a Function

Functions in JavaScript can be defined using the function keyword. Here is an example of a simple function that adds two numbers:

function add(a, b) {
  return a + b;
}

let result = add(5, 3);
console.log(result); // 8

Anonymous Functions

Anonymous functions are functions without a name. They are commonly used as callback functions or immediately invoked function expressions (IIFE). Here is an example of an anonymous function:

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

console.log(greet("Alice")); // Hello, Alice!

Arrow Functions

Arrow functions are a more concise way to write functions in JavaScript. They have a shorter syntax and do not bind their own this value. Here is an example of an arrow function:

let square = (num) => num * num;

console.log(square(4)); // 16

Fonksiyon kullanımını gösteren bir kod snippet’ı

Bir sayıyı string’e çeviren bir fonksiyon kullanımını aşağıdaki örnek kod parçasında görebilirsiniz:

let sayi = 42;
let sayiString = sayi.toString();
console.log(typeof sayiString); // "string"

Functions are a powerful feature in JavaScript that enable us to write clean and maintainable code. By understanding how functions work and how to use them effectively, you can take your coding skills to the next level.