How are computer programs written?

In computer science, source code is text written in a computer programming language. Such a language is specially designed to facilitate the work of computer programmers, who specify the actions to be performed by a computer mostly by writing source code, which can then be automatically translated to binary machine code that the computer can directly read and execute. An interpreter translates to machine code and executes it on the fly, while a compiler only translates to machine code that it stores as executable files; these can then be executed as a separate step.....by this computer programs written