Programming involves the preparation and writing of detailed instructions for a computer.
These instructions tell the computer exactly what data to use and what sequence of operations to perform without programs, a computer could not solve problems or deliver any other desired result. Programmers also test the operations of the program with sample data to make sure that the computer is operating as instructed. The correction of errors in the program is called debugging. A bachelor's degree is usually common, but requirements vary widely. On the job training is often available.