Explain the use of Go's panic and recover functions for handling run-time errors and panics in Go programs?

The use of Go's panic and recover functions for handling run-time errors and panics in Go programs.

**panic** is a built-in Go function that is used to cause a run-time error or panic. When a panic occurs, the program's execution is halted, and the program prints a stack trace and an error message to the console. A panic can be caused by an explicit call to the **panic** function or by a run-time error, such as a divide-by-zero error or a nil pointer dereference.

**recover** is another built-in Go function that is used to recover from a panic. **recover** can only be called from within a deferred function, which is a function that is scheduled to be executed after the current function has completed. If a panic occurs during the execution of a deferred function, the program will call **recover**, which will stop the panic and return the value that was passed to **panic**. If no panic occurred, **recover** returns nil.

Here is an example of how **panic** and **recover** can be used:

func main() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered from panic:", r)
        }
    }()
    doSomething()
}

func doSomething() {
    fmt.Println("Doing something...")
    panic("Oh no, something went wrong!")
}

In this example, the **main** function calls the **doSomething** function, which panics by calling **panic** with an error message. Because the **doSomething** function is called within a deferred function, the **recover** function is also called when the panic occurs. The **recover** function catches the panic, prints an error message to the console, and returns the error message to the **main** function. The **main** function then continues to execute normally.

It's worth noting that panics should be used sparingly and only in exceptional circumstances. In general, it is better to handle errors using the built-in error type and explicit error handling mechanisms in Go.