How to check if a file or directory exists using the os package in Golang?

To check if a file or directory exists using the os package in Golang, you can use the os.Stat() function. Here's an example:

package main

import (
	"fmt"
	"os"
)

func main() {
	// File path or directory path to check
	filePath := "/path/to/file.txt"
	
	// Check if the file/directory exists
	if _, err := os.Stat(filePath); os.IsNotExist(err) {
		fmt.Println("File or directory does not exist")
	} else {
		fmt.Println("File or directory exists")
	}
}

Make sure to replace /path/to/file.txt with the actual file path or directory path that you want to check. The os.Stat() function returns a FileInfo object and an error. If the error returned by os.Stat() is of type os.ErrNotExist or its equivalent, it means the file or directory does not exist.