Introduction of C Constants

C constants refers to the data items that do not change their value during the program execution. Several types of C constants that are allowed in C are:

Constant	Type of Value Stored
Integer Constant	Constant which stores integer value
Floating Constant	Constant which stores float value
Character Constant	Constant which stores character value
String Constant	Constant which stores string value

How to Declare Constant in C :-

We can declare constant using const variable. Suppose we need to declare constant of type integer then we can have following two ways to declare it –

const int a = 1; 
int const a = 1;

above declaration is bit confusing but no need to worry, We can start reading these variables from right to left. i.e

Declaration	Explanation
const int a = 1;	read as “a is an integer which is constant”
int const a = 1;	read as “a is a constant integer”