code-backups/go/rand3.go

package main

import (
    "crypto/rand"
    "fmt"
    "math/big"
    "strings"
    "strconv"
)

// Outputs cryptographically secure pseudo random number between min and max
// using crypt/rand.
func randomNumber(min, max int64) int64 {
    num, e := rand.Int(rand.Reader, big.NewInt(int64(max)))
    if e != nil {
        fmt.Print(e)
    }
    return num.Int64() + min
}

func main() {
	var sb strings.Builder
	for i := 0; i < 5; i++ {
    	sb.WriteString( strconv.FormatInt(randomNumber(1, 6), 10) )
    }
    // Show a Diceware random number
    fmt.Println(sb.String())
}