Assessment: Nested Loops

Section 7.14 Assessment: Nested Loops

Subgoals for Evaluating a Loop.

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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Trace the loop
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1. For every iteration of loop, write down values
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Exercises Exercises

1.

Q1: What is printed as a result of executing the following code segment?

int count = 0;
for (int x = 0; x < 4; x++) {
   for (int y = x; y < 4; y++)
      count++;
}
System.out.println(count);

4
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8
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10
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16
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20
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2.

Q2: What is the minimum number of times “Hello” can be printed?

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int k = // a random number such that 1 <= k <= n ;
for (int p = 2; p <= k; p++) {
   for (int r = 1; r < k; r++)
      System.out.println("Hello");
}

0
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1
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2
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n - 1
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n - 2
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3.

Q3: What is printed as a result of executing the following code segment?

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for (int r = 3; r > 0; r--) {
   int c;
   for (c = 1; c < r; c++)
      System.out.print("-");
   for (c = r; c <= 3; c++)
      System.out.print("*");
   System.out.println();
}

See diagram for answer A
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See diagram for answer B
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See diagram for answer C
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See diagram for answer D
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See diagram for answer E
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4.

Q4: What is printed as a result of executing the following code segment?

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for (int outer = 0; outer < 4; outer++) {
   for (int inner = 0; inner <= outer; inner++)
      System.out.print(outer + "  ");
}

0 1 2 3
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0 0 1 0 1 2
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0 1 2 2 3 3 3
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0 1 1 2 2 2 3 3 3 3
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0 0 1 0 1 2 0 1 2 3
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5.

Q5: What is printed as a result of executing the following code segment?

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int s = 0;
for (int outer = 1; outer <= 10; outer++) {
   for (int inner = outer; inner <= 10; inner++)
      s++;
}
System.out.println(s);

20
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45
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55
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100
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385
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