Loops

[momotaro]

how this line of code can know that there is more input needed?:

boolean continueLoop = true;

the original code is :

public class DivideByZeroWithExceptionHandling
{
   // demonstrates throwing an exception when a divide-by-zero occurs
   public static int quotient( int numerator, int denominator )
	  throws ArithmeticException
   {
	  return numerator / denominator; // possible division by zero
   } // end method quotient

   public static void main( String args[] )
   {
	  Scanner scanner = new Scanner( System.in ); // scanner for input
	  boolean continueLoop = true; // determines if more input is needed

	  do
	  {
		 try // read two numbers and calculate quotient
		 {
			System.out.print( "Please enter an integer numerator: " );
			int numerator = scanner.nextInt();
			System.out.print( "Please enter an integer denominator: " );
			int denominator = scanner.nextInt();

			int result = quotient( numerator, denominator );
			System.out.printf( "\nResult: %d / %d = %d\n", numerator,
			   denominator, result );
			continueLoop = false; // input successful; end looping
		 } // end try
		 catch ( InputMismatchException inputMismatchException )
		 {
			System.err.printf( "\nException: %s\n",
			   inputMismatchException );
			scanner.nextLine(); // discard input so user can try again
			System.out.println(
			   "You must enter integers. Please try again.\n" );
		 } // end catch
		 catch ( ArithmeticException arithmeticException )
		 {
			System.err.printf( "\nException: %s\n", arithmeticException );
			System.out.println(
			   "Zero is an invalid denominator. Please try again.\n" );
		 } // end catch
	  } while ( continueLoop ); // end do...while
   } // end main
} // end class DivideByZeroWithExceptionHandling

[momotaro]

ok sorry I figure it out thank you anyway :) !