Malloc program in Go

malloc.go

package main

import (
	"fmt"
	"strconv"
)

func main() {
	var mib int
	var answer string
	for {
		fmt.Println("How much memory, in MiB?")
		fmt.Scanln(&answer)
		var err error
		mib, err = strconv.Atoi(answer)
		if err != nil {
			fmt.Println("Not a number, try again.")
			continue
		}
		break
	}

	b := mib * 1024 * 1024
	arr := make([]byte, b)
	for i := range arr {
		arr[i] = 1
	}
	ignore(arr)
	fmt.Printf("Allocated %v bytes.\n", b)
	fmt.Println("Press enter to exit.")
	fmt.Scanln(&answer)
}

func ignore(_ []byte) {
	// Nothing
}