How can a function's result be returned using the Defer mechanism in programming languages?

In the Go language, the keyword defer is used to postpone the execution of a function until the surrounding function exits. This is convenient for releasing resources or performing cleanup actions.

To return a result from a function using the defer mechanism, you can use a named return parameter. Then, inside defer, you can modify the value of this parameter, and it will be returned from the function.

Example:

func example() (result int) {
    result = 1
    defer func() {
        result = 2 // change the return value
    }()
    return // returns result, which by this point has been changed to 2
}

Thus, defer allows modifying the function's return value before it finishes if a named result is used.