Read e-book online Making Use of JavaScript PDF

By Shweta Bhasin

ISBN-10: 0471219762

ISBN-13: 9780471219767

JavaScript is a flexible language that may be used to reinforce client-side and server-side scripting. JavaScript is usually regular for its skills to control consumer enter, exhibit textual content, play sounds, demonstrate photos, and converse with a plug-in response.* JavaScript, not like many different programming languages, is comparatively effortless to grasp, even if you haven't any programming adventure* Mastery of JavaScript permits net masters and site builders to simply upload interactivity, relocating past static HTML pages

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Following are the composite data types that JavaScript supports: • Object. Is a named collection of data that has properties and can be accessed through methods. • Array. Comprises objects that store a sequence of values. Following are the special data types that JavaScript supports: • null. Indicates an initial value that is different from other valid values. • undefined. Indicates that a variable has been created but is not assigned a value. Let’s now look at each of these in detail. Number Data Types JavaScript supports both integer and floating−point values that can be represented in decimal, octal, or hexadecimal notation.

Let us look at both of these in detail. Single−Line Comment Indicator You have already been using the // indicator to comment out the ending HTML comment tag. "); −−> In this example, the portion of the code from // to the end of the line will be ignored by JavaScript. Multi−Line Comment Indicator Eventually, you might need to use a comment that extends beyond a single line. To do this, you enclose the text to be displayed within /* and */. ");*/ //End hiding JavaScript−−> By now, you must be quite familiar with writing simple JavaScript code.

Quite a few of the special 48 characters, such as backspace and form feed characters, are not fully supported in the display of Web pages. However, you can still use these to insert formatting text within the code and files that JavaScript produces. 2 demonstrates how JavaScript special characters are being used. 2: Use of JavaScript special characters. The null Value There might be situations when you are not certain of what value you should assign to a variable. For example, while accepting user input, you may want to store the input in a variable.

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Making Use of JavaScript by Shweta Bhasin


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