IntegerReversing.go

package main
import(
  "fmt"
  "math"
)

func main(){

  //Input (hardcode values if you are using Go Playground since it doesn't support terminal input)
  var inputs [2]int
  fmt.Print("\nNumber: ")
  fmt.Scanf("%d\n", &inputs[0])
  fmt.Print("Length: ")
  fmt.Scanf("%d\n",&inputs[1])
  
  //Output
  dash := "\n----------"
  fmt.Println(dash, "\nFirst Method:")
  oldMethod(inputs[0], inputs[1])
  fmt.Println(dash, "\n", dash, "\nSecond Method:")
  newMethod(inputs[0])
  fmt.Println(dash)

}

func oldMethod(num, len int){
  for i:=0; i<len; i++{
    fmt.Print(num/pow(10,i) %10)
  }
}

func newMethod(num int){
  var prev int
  for i:=0;;i++{
    if prev==num{
      return
    }else{
      remainder:=((num-prev)/pow(10,i)) %10
      prev += remainder*pow(10,i)
      fmt.Print(remainder)
    }
  }
}




//Inna lillahi wa inna ilayhi raji'un
func pow(base, exp int) int{
  return int(math.Pow(float64(base), float64(exp)))
}