How to rename a file using the os package in Golang?

To rename a file using the os package in Golang, you can use the Rename function.

Here is an example:

package main

import (
	"fmt"
	"os"
)

func main() {
	oldName := "old_file.txt"
	newName := "new_file.txt"

	err := os.Rename(oldName, newName)
	if err != nil {
		fmt.Println("Error renaming file:", err)
		return
	}

	fmt.Println("File renamed successfully.")
}

In this example, we specify the old name of the file as "old_file.txt" and the new name as "new_file.txt". The os.Rename function is used to rename the file. If there is any error during the rename operation, an error message is printed. Otherwise, a success message is printed.