identifier in C++
identifier in C++

Identifiers in c++ Programming Language

The identifier are the names used to represent variable, constant, types, functions and labels in the program. Identifier is an important feature of all computer languages. A good identifier name should be descriptive but short.
An identifier in C++ may consist of 31 characters. If the name of an identifier is longer then 31 characters, the first 31 character will be used. The remaining characters will be ignored by C++ compiler. Some important rules for identifier name are as follows:
The first character must be an alphabetic or underscore (_).
The identifier name must consist of only alphabetic characters, digits or underscore.
The reserved word cannot be used as identifier name.


C++ provide the following type of identifiers:

Standard Identifiers

A type of identifier that has special meaning in C++ is known as standard identifier. C++ cannot use a standard identifier for its original purpose if it is redefined.
Cout and cin are example of standard identifiers. These are the names of input/output objects defined in standard input/output library iostream.h.

User Defined Identifiers

The type of identifier that is defined by the programmer to access memory location is known as user-defined identifier. The user defined identifier are used to store data and program result.
Some example of user defined identifiers are a marks and age etc.

Post a Comment

Previous Post Next Post