Can Const and Volatile Be Used Together?

Yes. A variable can be declared as both volatile and constant in C. Const modifier does not allow changing the value of the variable by internal program. ... So, a variable can be both volatile and constant in C.

Where do we use const and volatile together?

(#2) Read-only shared-memory buffer

Another use for a combination of const and volatile is where you have two or more processors communicating via a shared memory area and you're coding the side of this communications that will only be reading from a shared memory buffer.

What is the difference between const and volatile?

In C, const and volatile are type qualifiers and these two are independent. Basically, const means that the value isn't modifiable by the program. And volatile means that the value is subject to sudden change (possibly from outside the program).

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.