Question

Extend the Main method in such a way that repeatedly values could be read, till number 0 is given. Then the programme is finished. Before that the sum of all read in figures is still given, if all readable Values were integral numbers. In all other cases nothing is given.

Answer 1

import java.util.Scanner;
public class MainClass {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int sum=0;

while (true) {
System.out.println("Enter integer number or 0 for exit");
if (sc.hasNextInt()) {
int inputNumber = sc.nextInt();
if(inputNumber==0){
break;
}else{
sum=sum+inputNumber;
}

}else{
System.out.println("Error:wrong number "+sc.next());
}
}
System.out.println("sum="+sum);
}

}