A JavaScript tutorial contains instructions that will teach you how to code in JavaScript.
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There isn't much to it:---alert("Hello " + "world!");---'alert' creates a popup, and the + does string concatenation.See related link for a Javascript tutorial.
You need not download javascript. Any machine where you have a web browser like Internet Explorer or Mozilla would have javascript inbuilt in them. If you view the source (Right click-> View Source : and you can even try on this page itself), you will see tags such as <script type="text/javascript"> These is the embedded javascript code. If you have a source too in the script tag, simply locate the address and type it out in your browser, you will have the entire javascript file.
HTML, CSS, & JavaScript.
Javascript does not have classes
Javascript was created in 1995.