- A identifier which does not change its value during execution of a program is known as a constant or a literal.
Any attempt to change the value of a constant will result in an error message.
A keyword const is added to the declaration of an identifier to make that identifier constant.
Syntax :
const datatype variable = value;Example :
const float PI = 3.1415;
const char ch = 'A';
const int rate = 40;