Having the prototype available before the first use of the function allows the compiler to check that the correct number and type of arguments are used in the function call and that the returned value, if any, is being used reasonably. The function definition itself can act as an implicit function declaration.
While shellac is not usually the finish paint choice, it is often thought of as the best paint primer available. It has properties that oil and water based paints can't match, and provides a more dependable seal than most other primers are able to provide.
How to remove Shellac Nail Polish. You can easily remove shellac nail polish by wetting some cotton wool in acetone, and placing it over the nail. Wrap the tip of your finger and the acetone soaked cotton wool in tin foil to keep the cotton pad in contact with the nail for up to 10 minutes.