java scanner string to int
Scanner scanner = new Scanner(System.in);
while (true) {
String input = scanner.next();
try {
int a = Integer.parseInt(input);
if (a == 0) {
break;
}
System.out.println(Integer.parseInt(input) * 10);
} catch (NumberFormatException e) {
System.out.println("Invalid user input: " + input);
}
}