Call it something like 'HelloWorld.html' (when choosing a name for your file, always end the name with '.htm' or '.html'). Use your text editor to save the file.(You can write it yourself, or you can copy and paste from your browser For practice, try using your text editor to write a very simple HTML file like.The same pattern applies to all HTML tags: the end tag is made by adding ' /' (the forward slash character) to the beginning of the corresponding start tag. It is ended by the end tag ' '.įinally, the end of the document is indicated by the HTML end tag, ' '. Next comes the BODY section, with material The end of the HEAD section is indicated by the end tag, ' '. The HEAD section is where you would specify the title of the document, and also where you would put JavaScript functions used in the document. Has two sections, a HEAD section, which contains general information about the document, and a BODY section which contains the displayed material. They can help you remember what the different parts of your program are supposed to do.

Comments in an HTML file are ignored by the browser, so you can use them as notes to yourself. Tags are enclosedīy the characters ' ' (greater-than sign). HTML uses tags to designate various parts of the document. Here is the basic format of an HTML file:

JavaScript is a programming language for web pages, so the HTML file you will be.

Word processors do not save files as plain text by default. You should not use a word processing program (e.g., Word), because The 'Notepad' program that comes with Windows will do justįine.

You'll need to write your file with a text editor, which is a program that can.

These are things you need to know before you get started. Specifically, you will be working with HTML INPUT elements, and using JavaScript's built-in parseValue() and basic math functions. In this project, you will learn the basics of how JavaScript functions can be written to work with HTML FORM elements. You will learn how to write an HTML file containing your program, and how to load and run the file in your browser. The project uses JavaScript, an interpreted programming language supported by most Web browsers.

You will be writing a calculator that can add, subtract, multiply or divide two numbers. This is an example of a first-time programming project.

Javascript calculator