`std::logic_error` is a standard exception class in C++ that indicates an error in the program's logic. It is part of the C++ Standard Library and is used to signal situations where the program's internal assumptions are violated, such as passing invalid arguments to a function or attempting to access an element out of bounds. This type of error typically arises from mistakes in the code rather than issues with the environment or input data. When a `std::logic_error` is thrown, it can be caught using a try-catch block, allowing developers to handle the error gracefully. This exception class is a subclass of the base class `std::exception`, which provides a consistent interface for error handling in C++. By using `std::logic_error`, programmers can create more robust applications by identifying and addressing logical flaws during development.