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.
Keep the yearly summaries as long as you own the security, plus seven years. You need proof of your purchases to prove capital gains and losses on your tax return. Retirement plan statements: Keep quarterly statements for one year; dump them once you match the figures with your annual statement. Keep the annual summaries until you retire.