Similar to an automotive engineer who develops the parts of a car that makes the car run, the program developer provides the programs that make the site do what it supposed to do.
For example, if you are going to purchase a DVD player on an Internet website, you will be viewing some of the models available. Then when you decide on the one you would like to purchase, you click the Order button and you will be brought to a web form where you will enter all the pertinent information needed so that the company can process the information and send you the item. In the background, when you are viewing the DVD models, you are actually looking at a ‘program’, which is a set of instructions (called ‘code’) that allow you to view theses items and determine which of the items you pick. The instructions code continues when you enter your information in the form. When you click ‘submit’, the data is validated to be correct, then sent to a web server that will save the information to database and also checks the authentizety of your credit card. Then sends the information on to the distribution center where the item is sent to you.
In summary, web development provides the functionality of the site. We are providing some typical examples of programs found on the web and how they are used.
For example. Here is an example of a BASIC loop routine:
DO Starts the looping process. Anything between this and the LOOP command will be repeated over and over. Counter = 1 =1 PRINT Displays the message "I am Looping." LOOP WHILE Counter < 100 Tells the system to keep doing this routine until counter is below 100.
In the example above, the system will continue to print “I am Looping.” (on the screen) until the Counter surpasses 100.