Identifiers in C++

In C++ variables must be identified with unique names These unique names is known as identifiers.

Identifiers may be names (like x,y & z) or more descriptive names (age, sum, totalVolume) etc.

Example :

The General rules for unique identifiers that is:

• Names can contain letters, digits & underscores
• Names must begin with a letter or an underscore (_)
• Names are case sensitive (myVar and myvar are different variables)
• Special characters like !, #, %, etc are not allowed for unique name.
• C++ Reserved words (like keywords, such as int) cannot be used as names