How to Determine the Length of a File in Go?

Determining File Length in Go

The question arises: how can you determine the length of a file in Go? While the docs for golang.org/pkg/os/#File may not explicitly mention it, there is a simple method to extract this information.

To obtain the file length in Go, follow these steps:

1. Use the Stat() method on the *os.File object to retrieve the file's information into an os.FileInfo object.
2. Access the Size() method on the os.FileInfo object to obtain the file's length.

Here's an example code snippet:

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

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

This code snippet assumes that f is an *os.File object representing the file whose length you want to determine.

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