What is a valid description of an algorithm?

A valid description of an algorithm is a step-by-step procedure for solving a problem. An algorithm outlines a clear sequence of instructions that lead to the solution of a particular issue or task. This structure allows for systematic problem-solving by breaking it down into manageable parts, ensuring that each step can be executed in a logical order.

The focus on a step-by-step approach is what distinguishes algorithms from other concepts in programming. Unlike a visual representation of code, which may illustrate how an algorithm is implemented but does not encapsulate the algorithm itself, or programming language syntax, which pertains to the rules governing the structure of code in a specific language, the essence of an algorithm is its logical flow. Furthermore, while debugging is an essential part of coding, it is not the same as defining an algorithm, as debugging involves finding and fixing errors in already written code rather than outlining a procedure for problem-solving.