What is Javascript?.
Facts about JavaScript.
- The company, Netscape, designed JavaScript to provide an easy programming tools for HTML design.
- The official name of the language, according to the ECMA (European Computer Manufacturer's Association) standard, is ECMAScript, which defines the core of the JavaScript.
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JavaScript is much more than just what is defined in ECMA. Indeed, a complete JavaScript implementation is made up of the following
three distinct parts:
The Core JavaScript (ECMAScript) The Document Object Model (DOM) The Browser Object Model (BOM) - All codings in JavaScript are case-sensitive.
- JavaScript has only three primitive data types, which are numbers, strings and boolean values.
- Javascript is an object-oriented tools, which means you can work with objects as datatypes.
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JavaScript is a loosely typed language, meaning that no variable can clearly be defined
with a specific type (we use only the general type, var, for numbers, booleans, strings, objects and so on).
var myvariable=10; // It is also legal to omit the "var" keyword, but not recommended: myvariable=10;
- JavaScript is an interpreted language, which means that the script executes without any preliminary compilation.
- JavaScript will consist of several lines of executable script code, which in one way or another are included in an HTML page.
- JavaScript is used mainly as a tool to develope dynamic web pages on the client side, ie in a user's browser.
- JavaScript will work in all the major browsers available today ( ), but the use of JavaScript can vary in some topics that are involved.
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The syntax of JavaScript is a bit like java or C/C++, but it is also
the only similarity with these programming tools (They are far more complex).
for(var i=0 ; i < "text".length; i++ ) { document.write("_"+"text"[i]); }
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