Identifiers are the name given to a variable, function, array, structure etc. There are some rules for declaring an identifier:
- The identifier name must contain only alphabets, digits or an underscore.
- First character of an identifier must be either an alphabet or an underscore.
- Keywords can’t be used as an identifier name.
- Upper case and lower case identifiers are different.
- Space is not allowed between identifiers.
Note: Keep the identifier name maximum 8 characters long.
