Whether the identifier denotes an object of user-defined type or a type derived from a user-defined type. Whether the identifier denotes a function or a type derived from a function. The number of arguments to a function. The dollar sign is also a valid identifier in Visual C++.
Known to ancient Egyptians, watercolor painting is one of the oldest art forms. Artists from medieval times used watercolors for the illumination of parchment papers, but during the 16th, 17th and 18th centuries, watercolors were restricted to miniature paintings on card, ivory, parchment or porcelain.
A Country House and Park, Thomas Malton II (1748-1804), 1779, watercolour. Watercolour paint is made by mixing pigments with a binder, usually gum arabic, and then applying it with water to a support such as vellum (fine animal skin) or paper. The water evaporates and the binder fixes the pigment to the support.