In this article Keywords are predefined, reserved identifiers that have special meanings to the compiler They cannot be used as identifiers in your program unless they include @ as a prefix For example, @if is a valid identifier, but if is not because if is a keyword The first table in this topic lists keywords that are reserved identifiers in any part of a C# program People who use these types of keywords are searching for information For example, to support their idea of purchasing a particular product, they have already decided to buy, read reviews or compare prices You can distinguish this type of keyword by "question words" as they usually contain "where," "how," and so onIn the above program, float and return are keywords The float is used to declare variables, and return is used to return an integer type value in this program Keywords in C Video Tutorial To understand C Keywords in more depth, please watch this video tutorial How To Do Keyword Res...