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 What is JavaScript JavaScript is a high level programming Interpreted language.it is allow for developer add button animation website etc. This is run in the browser Work with the JavaScript 1. CSS 2. HTML 3. JavaScript (logic and behaviour) History of Javascript  . Create by Brendan Eich in 1995 . Develope at the Netscape  . Initially Name Mocha later live script finally Javascript  Why Javascript Important  . It is used frontend and the backend development  . The high job of freelancing JavaScript in The Variables it is used for the data store Var var name="Ram" Let let age = 20; Const const city= "Delhi" Use let and const Types of Data Primitive .String .Number .Boolean .Undefined .Null Symbol .Biglnt  Examples; let name="Aman"; //String let marks= 80;  //Number let isPass= true;  //Boolean Operators in JavaScript .Arithmetic: + - * / % .Logical: && || ! .Assignment: = += -= .Comparison: == === != > < Examples; let x = 45; l...