Project Euler Problem 40

euler40.go

package main

import (
	"bytes"
	"fmt"
	"strconv"
)

func main() {
	var champernowne bytes.Buffer
	n := 1
	max := 1000000
	for champernowne.Len() < max {
		number := strconv.Itoa(n)
		champernowne.WriteString(number)
		n += 1
	}
	cham := champernowne.String()
	result := 1
	for i := 1; i <= 1000000; i *= 10 {
		result *= int(cham[i-1] - 48)
	}
	fmt.Println(result)
}