1281. 整数的各位积和之差

1281. 整数的各位积和之差

package main
import "fmt"
func subtractProductAndSum(n int) int {
     var sum int =0
     var res int =1
     for n!=0{
         r := n%10
         n =n/10
         sum +=r
         res *=r
     }
     return res-sum
}
func main() {
    fmt.Println(subtractProductAndSum(234))
    fmt.Println(subtractProductAndSum(4421))
}