constant pointer vs pointer to constant in c programming language | volatile with const

In this video , we will talk about const qualifier , and will understand the concept of constant pointer and pointer to constant in c programming language and will see the difference among them.

const is a type specifier which changes the property of variable, which restricts the variable value to change at run-time .

The topics, that we will discuss in this video are ...
Basic concept .
Constant variable .
volatile with const .
pointer to constant .
constant pointer .
Const Verses MACRO .

Constant variable can be declared as .
const data type variable_name .
and we can do initialisation with declaration .
We can write const and data type back and forth.
Both are same.

Constant variable - Its value can not be changed at run -time . But, reference can be changed.

Contant pointer - value at memory can be changed using pointer, but pointer reference can not be changed .

constant pointer to constant variable - Neither value nor the reference can be changed.

Volatile with const - const restricts the variable value to get change at run-time. While volatile keyword allows it change unexpectedly. So, value can be changed at run-time unexpectedly not by normal execution.

const can be used where we have data type concern.
MACRO can be used where we have efficient code requirement.
#cprogramming #const #volatile #c++ #macro #pointers #pointerinc++ #pointerinc