Definition: An Identifier is a name for a variable, type, type member, template, class, function, namespace etc and is usually limited to letters, digits and underscores. Certain words are reserved and cannot be used as identifiers such as new.
Glossary:
A B C D E F G H I J K L M N O P Q R S T U V W X Y ZExamples:
Namespaces allow multiple definitions of the same identifiers without causing conflicts.
