C++ Identifiers
C++ Identifiers All C++ variables must be identified with unique names . These unique names are called identifiers . Identifiers can be short names (like x and y) or more descriptive names (age, sum, totalVolume). Note : It is recommended to use descriptive names in order to create understandable and maintainable code: Example // Good int minutesPerHour = 60; // OK, but not so easy to understand what m actually is int m = 60 ; Try it yourself! The general rules for constructing names for variables (unique identifiers) are: Names can contain letters, digits and underscores Names must begin with a letter or an underscore (_) Names are case sensitive ( myVar and myvar are different variables) Names cannot contain whitespaces or special characters like !, #, %, etc. Reserved words (like C++ keywords, such as int ) cannot be used as names