Learn and Master C Programming - volatile' keyword in C

The video tutorial explains the volatile keyword, which ensures that a variable's value is always reloaded from memory, preventing the compiler from optimizing it away. This is crucial for variables that can be modified by external processes, such as interrupt routines. An example is provided to illustrate its use, highlighting its importance in ensuring predictable program behavior. Despite its usefulness, the volatile keyword is rarely used by most developers.

What is the relationship between the volatile keyword and optimization by the compiler?

Describe the implications of not using the volatile keyword when needed.