How To Select A Radio Button Using JQuery (Dynamically) ?

It is very simple to select a radio using JQuery dynamically. Here is the example:

<input type="radio" name="sex" value="Male">Male</input>
<input type="radio" name="sex" value="Female">Female</input>

If you want to select radio button (Male)

$('input:radio[name=sex]:nth(0)').attr('checked',true);
or
$('input:radio[name=sex]')[0].checked = true;

Radio button index starts from 0, means for Male index will be 0 and for Female 1.
If you want to select radio buton(Female)

$('input:radio[name=sex]:nth(1)').attr('checked',true);
or
$('input:radio[name=sex]')[1].checked = true;

If you want to get selected  radio button value

$('input:radio[name=sex]:checked').val();

Check live example here: http://jsfiddle.net/jeetu_verma11/tgXKd/