package main
   
import (
    "fmt"
    "os"
)
   
func main() {
    f, err := os.Open("dotcoo.com.txt")
    if err != nil && os.IsNotExist(err) {
        fmt.Printf("file not exist!\n")
        return
    }
    fmt.Printf("file exist!\n")
    defer f.Close()
}
//go/4367