how to define variable in jquery

Question

jQuery is just a javascript library that makes some extra stuff available when writing javascript - so there is no reason to use jQuery for declaring variables. Use "regular" javascript:

var name = document.myForm.txtname.value;
alert(name);

EDIT: As Canavar points out in his example, it is also possible to use jQuery to get the form value:

var name = $('#txtname').val(); // Yes, it's called .val(), not .value()

given that the text box has its id attribute set to txtname. However, you don't need to use jQuery just because you can.

Try this :

var name = $("#txtname").val();
alert(name);

Here's are some examples:

var name = 'india';
alert(name);  


var name = $("#txtname").val();
alert(name);

Taken from http://way2finder.blogspot.in/2013/09/how-to-create-variable-in-jquery.html

In jquery, u can delcare variable two styles.

One is,

$.name = 'anirudha';
alert($.name);

Second is,

var hText = $("#head1").text();

Second is used when you read data from textbox, label, etc.

in jquery we have to use selector($) to declare variables

var test=$("<%=ddl.ClientId%>");

here we can get the id of drop down to j query variable