What are comments used for in code?

Comments in code serve the primary purpose of annotating the code for human readability. By including comments, a programmer can provide explanations, clarify complex sections, or describe the intention behind specific code segments. This is particularly beneficial when others (or even the original programmer at a later date) review the code, as it makes understanding the logic and functionality much easier. Comments do not affect the execution of the code, meaning they have no impact on performance or speed. They are purely for documentation and comprehension, making them an essential part of writing maintainable code.