Why we create a arrow function ? Arrow functions, introduced in ECMAScript 6, provide a concise syntax for writing anonymous functions in JavaScript. They offer a more streamlined and expressive way to define functions compared to traditional function expressions. The syntax for arrow functions consists of parameters enclosed in parentheses (if there are any), followed by the arrow symbol =>, and then the function body enclosed in curly braces {} if it’s a block statement, or a single expression if it’s an expression-bodied arrow function.

Why we create a function ? In JavaScript, a function is a block of reusable code that performs a specific task when called or invoked. Functions are fundamental building blocks of JavaScript programming and are used to encapsulate a set of instructions that can be executed one or more times. They enable code reuse, abstraction, and modularization, which are essential principles in software development. Creating a simple function in JavaScript.

What can we choose from const, let or var ? JavaScript, being a versatile and dynamic programming language, offers developers several ways to declare variables, each with its own scope and behavior. In this article, we’ll delve into the differences between const, let, and var, and when to use each one effectively. var: The Traditional Variable Declaration var is the oldest way to declare variables in JavaScript. It has a function scope, meaning it’s scoped to the nearest function block, rather than the nearest enclosing block like let and const.