Identifiers In C Programming

👉 In C programming, identifiers are the names assigned to different entities such as variables, functions, arrays, etc.

👉A programmer has to follow certain rules while naming variables, functions, arrays, etc

👉C language is case-sensitive so, ‘name’ and ‘NAME’ are different identifiers.

👉The first character of an identifier must NOT be a number and may not contain a space.

👉An identifier can include letters (a-z or A-Z), and digits (0-9).

👉An identifier can only begin with an underscore or letters.

👉We cannot name identifiers the same as keywords because they are reserved words to perform a specific task.

 👉If we use a keyword's name as an identifier the compiler will throw an error.

For example:

👉printf, scanf, int, char, struct, etc  InValid Identifiers

👉emp_name,emp_sal  ,stu_name,stu_no Valid Identifiers