An example program that write data to a file in Go programming language. Learn more https://golang.kertaskampus.com/write-data-to-a-file/

output.go

package main

import (
	"fmt"
	"log"
	"os"
)

func main() {
	file, err := os.OpenFile("output.txt", os.O_RDWR, os.ModePerm)
	if err != nil {
		log.Fatal(err)
	}

	data := []byte("Example of data")
	_, err = file.Write(data)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("write %q to output.txt\n", data)
}

output.txt

Example of data