Parameter

Parameters are located in the URL immediately after a question mark and are followed by an equal sign and a return value, known as name=value pairs. For example, in the URL /products/ furniture.asp?cart_id=445& product=couch, there are two name-value pairs. In the first, cart_id is the name and 445 is the value. In the second, product is the name and couch is the value. When URLs contain more than one parameter value, name-value pairs are separated by an ampersand (&).