Sum of 2 numbers with Repeatly in Java

 
//sum of 2 numbers with repeated loop
import java.io.*;
class Addition1
{
public static void main(String args[])throws IOException
{
int a,b,c;
String ch;

BufferedReader br= new BufferedReader( new InputStreamReader(System.in));
do
{
System.out.println("Enter the two numbers to add:");
a=Integer.parseInt(br.readLine());
b=Integer.parseInt(br.readLine());
c = a+b;
System.out.println("Sum of two numbers:"+ c);
System.out.println("Do u want to continue(y/n)?");
ch=br.readLine();
}while( ch.equals( "yes") || ch.equals( "YES") );
}
}


Output:
Enter the two numbers to add:
2
3
Sum of two numbers:5
Do u want to continue(y/n)?
yes
Enter the two numbers to add:
3
4
Sum of two numbers:7
Do u want to continue(y/n)?
no