JavaScript-Course-2025

Why is Array Search Important? Array search methods allow developers to: Key Array Search Methods 1. indexOf() This method returns the first index of a specified element. If the element is not found, it returns -1. Syntax: array.indexOf(searchElement, fromIndex); Example: let fruits = [“Apple”, “Banana”, “Cherry”, “Apple”];console.log(fruits.indexOf(“Apple”)); // Output: 0console.log(fruits.indexOf(“Grapes”)); // Output: -1console.log(fruits.indexOf(“Apple”, 1)); // … Read more

Categories of Array Methods JavaScript array methods can be grouped into different categories based on their functionality: Each category is explained below with examples. 1. Adding and Removing Elements push() Adds one or more elements to the end of an array. let fruits = [“Apple”, “Banana”];fruits.push(“Cherry”);console.log(fruits); // Output: [“Apple”, “Banana”, “Cherry”] pop() Removes the last … Read more

Arrays allow you to store and manage multiple values in a single variable, making them essential for handling collections of data. They are dynamic, meaning their size and content can change as needed and they offer a wide range of methods to manipulate and interact with their elements. What Are Arrays in JavaScript? An array … Read more

What are JavaScript number properties? JavaScript number properties represent important constants such as the maximum and minimum values a number can have, special values like NaN (Not-a-Number) and infinity representations. These properties are static, meaning they are accessed directly on the Number object and not on an instance. List of JavaScript Number Properties 1. Number.MAX_VALUE … Read more

What Are Number Methods JavaScript provides a rich set of Number methods to manipulate and format numbers. These methods allow developers to perform tasks like converting numbers to strings, formatting decimals and handling numeric precision. Key JavaScript Number Methods 1. toString(): Converting a Number to a String The toString() method converts a number into a … Read more

What is BigInt ? JavaScript BigInt is a special data type introduced in ES2020 to handle large integers beyond the limit of the Number type. Unlike regular numbers, BigInt allows you to perform calculations with values larger than 253−12^{53} – 1253−1 (the maximum safe integer for the Number type). Why Use BigInt? JavaScript’s Number type … Read more

What is JavaScript Numbers ? JavaScript numbers are a fundamental data type used for mathematical operations and handling numerical data. JavaScript treats all numbers as floating-point (decimal) numbers, making it versatile for different calculations. This guide covers JavaScript numbers, their properties, methods and common use cases with coding examples. Number Types in JavaScript JavaScript does … Read more

What is JavaScript String Templates ? JavaScript string templates, also known as template literals, are a modern and powerful way to work with strings. Introduced in ES6 (ECMAScript 2015), they offer a cleaner and more readable syntax for string interpolation, multiline strings and embedding expressions. Why Use String Templates? Template Literal Syntax Template literals use … Read more

What is JavaScript String Search ? In JavaScript, strings are one of the most commonly used data types and being able to search within them is vital for tasks like validating user inputs, extracting data and building dynamic applications. JavaScript offers multiple methods to search for substrings or patterns within a string efficiently. Why Learn … Read more

Introduction to JavaScript String Methods String methods in JavaScript allow developers to manipulate and process strings efficiently. Whether trimming spaces, splitting text or replacing characters, these methods simplify handling text data in programming tasks. Why Are String Methods Important? String methods are essential for: Common JavaScript String Methods Let’s dive into the most frequently used … Read more