使用golang实现一个函数，功能是生成一串6位数的随机数字字符串

generateRandomDigits.go

/*使用golang实现一个函数，功能是生成一串6位数的随机数字字符串*/
package main

import (
	"fmt"
	"math/rand"
	"time"
)

var digits = []rune("0123456789")
var seed = rand.NewSource(time.Now().UnixNano()) // create a random number generator with the seed
var rng = rand.New(seed)

func GenPinCode(keyLen int) string {
	if keyLen < 1 {
		keyLen = 6
	}

	result := make([]rune, keyLen)

	// loop n times and append a random digit to the result
	for i := range result {
		result[i] = digits[rng.Intn(len(digits))]
	}

	return string(result)
}

func main() {
	fmt.Println(GenPinCode(6))
	fmt.Println(GenPinCode(6))
	fmt.Println(GenPinCode(6))
}