Go Language: Generate random string of fixed length

Using rand.Read method

func GenerateRandomString(length int) string {

         tempBytes := make([]byte, length)

         _, err := rand.Read(tempBytes)

         if err != nil {

                  fmt.Println("Error: ", err)

                  return ""

         }

         return fmt.Sprintf("%X", tempBytes)

}

App.go

package main

import (
	"crypto/rand"
	"fmt"
)

func GenerateRandomString(length int) string {
	tempBytes := make([]byte, length)
	_, err := rand.Read(tempBytes)

	if err != nil {
		fmt.Println("Error: ", err)
		return ""
	}

	return fmt.Sprintf("%X", tempBytes)
}

func main() {
	randStr1 := GenerateRandomString(10)
	randStr2 := GenerateRandomString(20)
	randStr3 := GenerateRandomString(30)

	fmt.Printf("randStr1 : %v\n", randStr1)
	fmt.Printf("randStr2 : %v\n", randStr2)
	fmt.Printf("randStr3 : %v\n", randStr3)
}

Sample Output

randStr1 : 282A0A932F3609E87107

randStr2 : 35835506E0EC0F27E483156A5AB044FA79B33686

randStr3 : 1B0ACE0CE978FFE71DFF999B1953FEE627464682128AC54DF7A322E80C58

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