Check if file exists

gistfile1.go

package main
import(
   "fmt"
   "os"
)
func main() {
   if fileExists("sample.txt") {
      fmt.Println("sample file exists")
   } else {
      fmt.Println("sample file does not exist")
   }
}
func fileExists(filename string) bool {
   info, err := os.Stat(filename)
   if os.IsNotExist(err) {
      return false
   }
   return !info.IsDir()
}