Question

What is an Identifier? List the rules required to form variable names in C.

Answer 1

An identifier is a name that identifies either a unique object or a unique class of objects, where the "object" or class may be an idea, physical [countable] object, or physical [non countable] substance. Rules for naming a variable in C. A variable name can have letters (both uppercase and lowercase letters), digits and underscore only. The first letter of a variable should be either a letter or an underscore. However, it is discouraged to start variable name with an underscore.