public static void main (String[]args){
System.out.println("Insert value:");
Scanner inputizer = new Scanner (System.in);
double diver = inputizer.nextLong();
while (diver < 0) {
System.out.println("Re-enter value bigger than 0:");
System.out.println("Insert value:");
Scanner inputizer = new Scanner (System.in);
double diver = inputizer.nextLong();