Skip to main content

Javascript Variable


JavaScript Variables


As with algebra, JavaScript variables are used to hold values or expressions.

A variable can have a short name, like x, or a more descriptive name, like carname.

Rules for JavaScript variable names:

  • Variable names are case sensitive (y and Y are two different variables)
  • Variable names must begin with a letter or the underscore character
The Main thing of javascript variable is u can store any kind of value in that variable even it is string or numeric value.

Note: Because JavaScript is case-sensitive, variable names are case-sensitive.

Example

A variable's value can change during the execution of a script. You can refer to a variable by its name to display or change its value.


var m;

var p;

m = "testing for javascript" ;

p=15;
Labels:

Comments

Post a Comment

Popular posts from this blog

Number Format In Javascript

Number.toFixed() :                                 Formats any number for "x" number of trailing decimals. The number is rounded up, and "0"s are used after the decimal point if needed to create the desired decimal length.   var profits=2489.8237 profits.toFixed(3) //returns 2489.824 (round up) profits.toFixed(2) //returns 2489.82 profits.toFixed(7) //returns 2489.8237000 (padding)   Number.toPrecision() :                                   Formats any number so it is of "x" length. Also called significant digits. A decimal point and "0"s are used if needed to create the desired length.   var anumber=123.45 anumber.toPreci...
2 comments
Read more

Disable right click

Hello there Sometimes we want to disable right click in our webpage for security reason. That we can do with the use of javascript. here is the code     <SCRIPT TYPE="text/javascript">             var message="Sorry, right-click has been disabled";                         function clickIE() {                 if (document.all) {                     (message);                     return false;                 }             }             function clickNS(e) {  ...
Post a Comment
Read more

Difference between == and === in php

Two of the many comparison operators used by PHP are '==' (i.e. equal) and '===' (i.e. identical). The difference between the two is that '==' should be used to check if the values of the two operands are equal or not. On the other hand, '===' checks the values as well as the type of operands. Let me explain more using some examples: '==' (Equal): if("22" == 22) echo "YES"; else echo "NO";      The code above will print "YES". The reason is that the values of the operands are equal. Whereas when we run the example code below: '===' (Identical): if("22" === 22) echo "YES"; else echo "NO"; The result we get is "NO". The reason is that although values of both operands are same their types are different, "22" (with quotes) is a string while 22 (w/o quotes) is an integer. But if we change the code above to t...
Post a Comment
Read more