What is the role and purpose of the keyword finally in programming languages?

The keyword finally is used in exception handling blocks to define code that should execute in any case — regardless of whether an exception was thrown or not.

This is useful for releasing resources, closing files, database connections, and other cleanup operations.

Example in C#:

try {
    // code that may throw an exception
}
catch (Exception ex) {
    // exception handling
}
finally {
    // code that will always execute
}

Thus, finally guarantees the execution of important cleanup code, enhancing the reliability of the program.