This section will present you with a tricky technique that was first mentioned in the previous chapter. This technique involves the use of the panic() and recover() functions and will be presented in panicRecover.go, which you will see in three parts.
Strictly speaking, panic() is a built-in Go function that terminates the current flow of a Go program and starts panicking. On the other hand, the recover() function, which is also a built-in Go function, allows you to take back control of a goroutine that just panicked using panic().
The first part of the program is next:
package main
import (
"fmt"
)
func a() {
fmt.Println("Inside a()")
defer func() {
if c := recover(); c != nil {
fmt.Println("Recover inside a()!")
}
}()
fmt.Println("About to call b()")
b...
