In this stage, process of writing actual program takes place. A coded program is most popularly referred to as a source code. The coding process can be done in any language (high level and low level). The actual use of computer takes place in this stage in which the programmer writes a sequence of instructions ready for execution. Coding is also known as programming.
Good program possess following characteristics :
- Comment clauses in the program help to make the program readable and understandable by people other than the original programmer.
- It should be efficient.
- It must be reliable enough to work under all reasonable conditions to provide a correct output.
- It must be able to detect unreasonable error conditions and report them to the end user or programmer without crashing the system.
- It should be easy to maintain and support after installation.