Computer source code is written by programmers in a programming language using either the imperative or declarative programming paradigm. Source code is compiled into an executable file that is run on a central processing unit or interpreted with an interpreter. Computer programs are categorized as system software, which runs the computer, or application software, which performs tasks for users. Programs can run simultaneously through multitasking.

6. A flowchart is a type of diagram, that represents an algorithm or process, showing the steps as boxes of various kinds, and their order by connecting these with arrows. This diagrammatic representation can give a step-by-step solution to a given problem. Data is represented in these boxes, and arrows connecting them represent flow / direction of flow of data. Flowcharts are used in analyzing, designing, documenting or managing a process or program in various fields.