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.
Renewing your Massachusetts CDL is a lot easier than obtaining it. It's good for 5 years and expires on your birthday. With a CDL, you are required to renew in person at any Registry of Motor Vehicles office. The renewal fee is $75 for 5 years. You cannot renew online. You will need to pass an eye exam, and a background check for motor vehicle violations or warrants nationwide, and pay for for your CDL and any endorsements.