creation: 08/08/99; revised: 08/23/2010, 07/23/2017

Fill in the Blanks

Rule for Matching if and else:   Within each pair of matching braces: start with the first if and work downward. Each else matches the closest previous unmatched if. An if matches only one else and an else matches only one if.

1.   Click on the that matches the IF in capitals (of course, in a real Java program the if has to be lower case.) 

  IF ( val == 34 )
       sum = sum + val;
  
      sum = sum - val;
  
  if ( sum < limit )
       flag = true;
  
       flag = false;
  
  IF ( val == 34 )
      if ( sum < limit )
           sum = sum + val;
      
          sum = sum - val;
  
      sum = sum + 1;

  if ( val == 34 )
       sum = sum + val;
  
      sum = sum - val;
  
  IF ( sum < limit )
       flag = true;
  
       flag = false;

  if ( val == 34 )
      IF ( sum < limit )
           sum = sum + val;
      
          sum = sum - val;
  
      sum = sum + 1;

2.   Click on the that matches the IF in capitals. 

IF ( val == 34 )
{
     sum = sum + val;
     val = 0;
     next= 5;
}

{
    sum = sum - val;

    if ( sum < limit )
         flag = true;
    
         flag = false;
}

  IF ( val == 34 )
  {
      if ( sum < limit )
           sum = sum + val;
  }
  
  {
      sum = sum - val;
      val = sum + 1;
  }
  
  if ( val == 34 )
  {
       sum = sum + val;
       val = 0;
       next= 5;
  }
  
  {
      sum = sum - val;
  
      IF ( sum < limit )
           flag = true;
      
           flag = false;
  }
  
  IF ( val == 34 )
  {
      if ( sum < limit )
           sum = sum + val;
      if ( val >= limit )
           val = sum - limit;
      
           val = 0;
  }
  
      if ( val = -12 )
          sum = 0;
      
          limit = 88;

3.   The idea of a controled loop is that there is a special value that says when the loop is done.

4.   The special sentinel value must not be a value that could ever occur in the .

5.   Complete the following fragment so that if data is "Hello" it writes "World". 

if ( data. ( "Hello" ) )
    System.out.println("World");

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