Example of exception handling in Go

panic_example.go

// Exception handling example, fleshed out from Rob Pike's post
// at http://goo.gl/ZiUra

package main

import "fmt"

func f(dopanic bool) { 
    defer func() { 
        if x := recover(); x != nil { 
            fmt.Printf("panicking with value %v\n", x) 
                panic(x)  // go back to panicking 
        } 
        fmt.Printf("function returns normally\n") 
    }() 
    fmt.Printf("before\n") 
    p(dopanic) 
    fmt.Printf("after\n") 
} 

func p(dopanic bool) { 
    if dopanic { 
        panic(3) 
    } 
} 

func main() {
    fmt.Printf("Calling f(false)\n")
    f(false)
    fmt.Printf("\n\n")
    fmt.Printf("Calling f(true)\n")
    f(true)
}