This simple example illustrates a few reasons why functions are a brilliant idea, and have become fundamental building blocks in many programming languages: 1  Functions enable you to reuse parts of your program. 2  Functions make understanding the program easier because they give a name and a structure to a set of instructions.
How to keep your PPL(A) Current. Once you have obtained your JAA PPL it remains valid for five years provided that you keep your medical certificate and fly enough hours each year to keep your certificate of experience current. Your certificate of experience is part of your licence and is valid for two years.
It is worth us adding that PPI claims older than 6 years may be more complicated and difficult to resolve than those within 6 years. The reason for this is that banks are only obliged to keep records for 6 years and therefore may not have the paperwork relating to your policy if it was sold more than 6 years ago.This is not a problem if you still have all the paperwork yourself, of course.he reason for this is that banks are only obliged to keep records for 6 years and therefore may not have the paperwork relating to your policy if it was sold more than 6 years ago. This is not a problem if you still have all the paperwork yourself, of course.