HDOJ 1091 A+B for Input-Output Practice (III)

Problem Description
Your task is to Calculate a + b.

Input
Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.

Output
For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.

Sample Input
1 5
10 20
0 0

Sample Output
6
30

import java.util.*;
class Main{
  public static void main(String args[]){
    Scanner sc =new Scanner(System.in);
    while(sc.hasNext()){

    int a=sc.nextInt();
    int b=sc.nextInt();
    if(a==0&&b==0)
      return ;  
    System.out.println(a+b);
    }
  }
}