go - convert int array to byte array in Golang -

i'm trying create random int arrays , write xyz.txt file in golang.
how convert ids int array byte array, file.write accepts []byte parameter. correct way achieve writing random integer arrays text file.

func main() {     var id int     var ids []int     var count int      f, err := os.create("xyz.txt")     check(err)      defer f.close()      j := 0; j < 5; j++ {         count = rand.intn(100)         := 0; < product_count; i++ {             id = rand.intn(1000)             ids = append(product_ids, product_id)         }         n2, err := f.write(ids)         check(err)         fmt.printf("wrote %d bytes\n", n2)     } } 

you may use fmt.fprint, simplified working sample:

package main  import (     "bufio"     "fmt"     "math/rand"     "os" )  func main() {     f, err := os.create("xyz.txt")     if err != nil {         panic(err)     }     defer f.close()     w := bufio.newwriter(f)     defer w.flush()      j := 0; j < 5; j++ {         count := 4 //count := rand.intn(100)         := 0; < count; i++ {             fmt.fprint(w, rand.intn(1000), " ")         }         fmt.fprintln(w)     } } 

xyz.txt output file:

81 887 847 59  81 318 425 540  456 300 694 511  162 89 728 274  211 445 237 106