Commenting is the art of describing what your program is going to do in high level English statements. Commenting is best done before actually writing the code for your program. Comments are specially marked lines of text in the program that are not evaluated. There are usually two syntactic ways to comment. The first is called a single line comment and, as implied, only applies to a single line in the source code (the program). The second is called a Block comment and refers usually refers to a paragraph of text. A block comment has a start symbol and an end symbol and everything between is ignored by the computer.
Most of these inventions were not completely original but improvements of earlier inventions. However, one of Edison's major innovations was the first industrial research and development lab, which was built in Menlo Park and West Orange. Throughout the 20th century, Edison was the world's most prolific inventor.
Aside from being an inventor, Edison was also a successful manufacturer and businessman, marketing his inventions to the public. In 1876, the year of the American centennial, he opened his first full-scale industrial research laboratory in Menlo Park, New Jersey.