Download Comprehensive JavaScript Cheat Sheet and more Cheat Sheet Computer Programming in PDF only on Docsity! Title: Comprehensive JavaScript Cheat Sheet INTRODUCTION :- High-level, interpreted programming languages like JavaScript are frequently employed to build dynamic, interactive webpages. Brendan Eich created it in 1995, and it has since grown to be one of the most widely used languages for online development. JavaScript is a full-fledged programming language that allows developers to add interaction and functionality to online pages, in contrast to HTML and CSS, which are markup languages used to structure and style web content. You can make API queries, manage user events, calculate, manipulate data, design responsive user interfaces, and much more with JavaScript. This cheat sheet provides an overview of essential JavaScript concepts and syntax. 1. Variables: โ Declaring variables: let variableName; - declares a variable that can be reassigned. const constantName; - declares a variable with a constant value (read- only). โ Assigning values: variableName = value; - assigns a value to a variable. โ Variable types: JavaScript has dynamic typing, meaning variables can hold different types of values such as numbers, strings, booleans, objects, arrays, null, and undefined. 2. Data Type:- โ Number: Represents numeric values, including integers and floating-point numbers. โ String : Represents textual data enclosed in single or double quotes โ Boolean: Represents the logical values true or false. โ Object : Represents a collection of key-value pairs and can contain functions, variables, and other objects. โ Array: Represents an ordered list of values and can store multiple values of any type โ Null: Represents the intentional absence of any object value. โ Undefined : Represents an uninitialized variable or missing property. 3. Operators: โ Arithmetic: Perform mathematical operations on numbers. + (addition), - (subtraction), * (multiplication), / (division), % (modulus). โ Assignment: Assign values to variables. = (assignment), += (addition assignment), -= (subtraction assignment), *= (multiplication assignment), /= (division assignment). โ Comparison: Compare values and return a Boolean result. == (equality), === (strict equality), != (inequality), !== (strict inequality), > (greater than), < (less than), >= (greater than or equal to), <= (less than or equal to).
