Can a variable be both constant and volatile in C?
Yes, a variable can be both constant and volatile in C. we can use constant and volatile both variables together. The volatile and const variable together is used at the time of accessing the GPIO registers. In this case, its value is changed by the 'external factors' if a switch or any output device is attached with GPIO. In this situation, the volatile variable is important because it ensures that the compiler always read the value from the GPIO address and avoids making any assumption.
