如何在Go中获取文件长度？

Question

I looked up golang.org/pkg/os/#File , but still have no idea. Seems there is no way to get file length, did I miss something?

How to get file length in Go?

Answer 1

(*os.File).Stat() returns a os.FileInfo value, which in turn has a Size() method. So, given a file f, the code would be akin to

fi, err := f.Stat()
if err != nil {
  // Could not obtain stat, handle error
}

fmt.Printf("The file is %d bytes long", fi.Size())