Logic Building Episode 1 : Generate N digit random number based on input

Problem Statement: Write a function that generates an N digit random number based on the N input.

Input: N=5
Output: XXXXX (N digit random number)
Input: N= 2
Output: XX

Give try yourself, before look at the solution and share your solution in the comment.

package main

import (

"fmt"

"math/rand"

"strconv"

"strings"

"time"

)

// random func will generate a random digit number based on param.

func random(param int) {

rand.Seed(time.Now().UnixNano())

chars := []rune("0123456789")

var b strings.Builder

for i := 1; i <= param; i++ {

b.WriteRune(chars[rand.Intn(len(chars))])

}

str := b.String()

i, err := strconv.Atoi(str)

if err != nil {

fmt.Println("error while convert")

}

fmt.Println(i)

}

// Driver

func main() {

random(5) // N = 5

}

Output:

λ random go run main.go

76929 λ random go run main.go 35246 λ random go run main.go 71719 λ random go run main.go 81434 λ random go run main.go 95233 λ random go run main.go 33170 λ random go run main.go