Subroutines

A procedure is a block of code that performs a specific task. As programs become more and more complex, keeping your code organized can become a headache. Dividing your code into smaller chunks of code(procedures) makes it easier to manage. In addition, redunent and repetative tasks can be handled easily using Sub Procedures.

Lets take a look at an example program

This program simply supplies directions to get to various cities from Nanaimo. I am going to save typing because

To go to Campbell River, I go to Parksville, then Courtney, then Campbell River

To go to Mt Washington, I go to Parksville, the Courtney, then up the mountain

To go to Parksville, I go to Parksville.

I don't want to write out of directions to Parksville 3 times. So I will use a procedure once and call it 3 times.

Check out the code

Option 2 takes us to Mt Washington but I reuse the GotoParksville Procedure. (Pretty smart eh?)

So what do these new subroutines look like and how do I create them

Well here they are

At this point check out the first assignment.