Learn JavaScript -Day 1

   

In this articles, we learn about JavaScript.

                        

                                   

                                       

What is JavaScript:

• JavaScript is a light-weight object-oriented programming language when is used by several websites for scripting the webpages.

• It is an interpreted, full-fledged programming language that enables dynamic interactivity on websites when applied to an HTML document. 

• Although, JavaScript has no connectivity with Java programming language
• In addition to web browsers, databases such as CouchDB and MongoDB uses JavaScript as their scripting and query language.

          

Features of JavaScript:

• All popular web browsers support JavaScript as they provide built-in execution environments.
• JavaScript is an object-oriented programming language that uses prototypes rather than using classes for inheritance.
• It is a light-weighted and interpreted language.
• JavaScript code should be written in a script.
• Its case sensitive and always needs a semicolon.
• JavaScript is a dynamic language not static.  
• Data types are inferred.
          

Application of JavaScript:

       JavaScript is used to create interactive websites. It is mainly used for:

•  Client-side validation,
•  Dynamic drop-down menus,
•  Displaying date and time,
•  Displaying popup windows and dialog boxes (like an alert dialog box, confirm dialog box and prompt dialog box),
•  Displaying clocks etc.

Example:

Program:

               

Output:

                 

Thank you!!!!