How do I put text in a drop down list?

We can select text or we can also find the position of a text in a drop down list using option:selected attribute or by using val() method in jQuery.

By using val() method :
The val() method is an inbuilt method in jQuery which is used to return or set the value of attributes for the selected elements.

Syntax :

$(selector).val(parameter)

Parameter : parameter is optional.

Example :

Output :
Before click on the button.

After click on the button.

By using option:selected :
The option:selected method is a way in jQuery which is used to return the selected element from a list of the element.

Syntax :

$("#selector option:selected");

Parameter : No parameter required.

Example :

Output :
Before click on the button.

After click on the button.

jQuery is an open source JavaScript library that simplifies the interactions between an HTML/CSS document, It is widely famous with its philosophy of Write less, do more.
You can learn jQuery from the ground up by following this jQuery Tutorial and jQuery Examples.