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.
I would advise you to keep records and tax returns for the years that include out-of-the-ordinary transactions (sales or donations of property), and income from activities such as stock option exercises, trust income, etc., for six years after the filing date of the return. find that in the case of tax returns, many people are afraid to discard them or confused as to how long they should keep them. The result is that they keep them all. One client told me he kept every tax return he filed going back over 30 years! Keeping all of your financial papers that long is not a good strategy.