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Subgoals

Section 7.13 Loops-WE6-P1

Subgoals for Evaluating a Loop.

  1. Identify loop parts
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    1. Determine start condition
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    2. Determine update condition
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    3. Determine termination condition
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    4. Determine body that is repeated
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  2. Trace the loop
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    1. For every iteration of loop, write down values
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Subsection 7.13.1

Exercises Exercises

1.
Q15: What is the output of the following loop?
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for (int m = 0; m < 4; m++)
{
   for (int n = 5; n >= 0; n--)
   {
      System.out.print("#");
   }
   System.out.println();
}
  • 5 lines of ###
  • Incorrect
  • 3 lines of #####
  • Incorrect
  • 4 lines of ######
  • Correct
  • 5 lines of ####
  • Incorrect
  • Compilation error
  • Incorrect
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2.
Q16: What is the output of the following loop?
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for (int m = 0; m < 4; m++)
{
   for (int n = 0; n <= m; n++)
   {
      System.out.print("$");
   }
   System.out.println();
}
Figure 7.13.1.
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  • See diagram for answer A
  • Correct
  • See diagram for answer B
  • Incorrect
  • See diagram for answer C
  • Incorrect
  • See diagram for answer D
  • Incorrect
  • See diagram for answer E
  • Incorrect
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3.
Q17: What is the output of the following loop?
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for (int m = 1; m < 5; m++)
{
   for (int n = 1; n <= m; n++)
   {
      System.out.print(" ");
   }
   System.out.println("$");
}
Figure 7.13.2.
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  • See diagram for answer A
  • Correct
  • See diagram for answer B
  • Incorrect
  • See diagram for answer C
  • Incorrect
  • See diagram for answer D
  • Incorrect
  • See diagram for answer E
  • Incorrect
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