JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a mulch-paradigm language, supporting object-oriented, imperative, and functional programming styles.
JavaScript was formalized in the ECMAScript language standard and is primarily used in the form of client-side JavaScript, implemented as part of a Web browser in order to provide enhanced user interfaces and dynamic websites. This enables programmatic access to computational objects within a host environment.
<html>
<head>
<script type="text/javascript">
function displaydate()
{
document.getElementById ("demo").innerHTML=Date();
}
</script>
</head>
<body>
<h1>My first Javascript</h1>
<p id="demo">this is a paragraph.</p>
<button type="button" onclick="displaydate()">Display Date</button>
</body>
</html>
<head>
<script type="text/javascript">
function displaydate()
{
document.getElementById ("demo").innerHTML=Date();
}
</script>
</head>
<body>
<h1>My first Javascript</h1>
<p id="demo">this is a paragraph.</p>
<button type="button" onclick="displaydate()">Display Date</button>
</body>
</html>
For short comment : // and comment & for long comment /* and long comment and closed to */
Java Script Variables :
A variables is when java script keep information. the two types of variable ---
- Local
- Gobble
In Java Script without declaration you can use a variables
Var x;
---------- declare variable
x=27;
-------------
y = 34; No declaration
JAVA SCRIPT Operators :
Modulus :
+
-
/
%
++ Inc by,
-- dis by,
= x = y
+= x+ =y x = x+y
-= x-= y x = x-y
*= x* = y x = x*y
/= x/ = y x = x/y
%= x% =y x = x%y
Text1 = " is in";
Text2 = " Agra";
Text3 = "Taj Mahal";
Text4 = Text3+Text1+Text2
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