package main import ( "bytes" "fmt" "log" ) func main() { d := []byte{0x01, 0xff, 0x3a, 0xcd} s := fmt.Sprintf("%x", d) fmt.Printf("Hex: %s\n", s) var decoded []byte _, err := fmt.Sscanf(s, "%x", &decoded) if err != nil { log.Fatalf("fmt.Sscanf() failed with '%s'\n", err) } if !bytes.Equal(d, decoded) { log.Fatalf("decoded version is different than original") } n := 3824 fmt.Printf("%d in hex is 0x%x\n", n, n) }