Complete Modern C++ - std::optional - I

The video tutorial explains the use of the STD optional library in C, which allows functions to return a type that may or may not contain a value, avoiding the need for predefined return values or creating expensive objects. It covers how to use STD optional, including checking if it contains a value and initializing it. The tutorial provides a practical example of using optional in a function that returns an error message, demonstrating how to handle cases where the error code does not exist. The video concludes with methods to initialize optional using direct initialization or the make optional helper function.

What is the significance of using a nullable type in programming?

Why is it important to check if a message is valid before displaying it?

Describe how to initialize an optional in C++.