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Subgoals

Section 5.14 Assessment: Nested If-Statements

Subgoals for Evaluating Selection Statements.

  1. Diagram which statements go together
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  2. For if statement, determine whether expression is true or false
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  3. If true – follow true branch, if false – follow else branch or do nothing if no else branch
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Exercises Exercises

    1.

    Q1: Following this code what is the value of delta?
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    int alpha = 5, beta = 2, gamma = 3, delta = 0, eta = 0;
if (alpha > beta)
{
    if (beta > gamma)
    {
      delta = 10;
    }
    else
    {
      delta = 20;
    }
}
else
{
    if (gamma > beta)
    {
      delta = 30;
    }
    else
    {
      delta = 40;
    }
}
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    2.

    Q2: Following this code, what is the value of eta?
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    int alpha = 5, beta = 2, gamma = 3, delta = 0, eta = 0;
if (alpha > beta)
{
    if ((beta * gamma) <= alpha)
    {
      eta = 50;
    }
    else
    {
      eta = 60;
    }
}
else
{
    if (delta > beta)
    {
      eta = 70;
    }
    else
    {
      eta = 80;
    }
}
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    3.

    Q3: Following this code, what is the value of delta?
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    int alpha = 5, beta = 2, gamma = 3, delta = 0, eta = 0;
if (alpha > gamma)
{
    if (gamma > beta)
    {
      delta += 1;
    }
    if (gamma > alpha)
    {
      delta += 2;
    }
}
if ((beta + gamma) >= alpha)
{
    if ((alpha - beta) > gamma)
    {
      delta += 3;
    }
    else
    {
      delta += 4;
    }
}
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    4.

    Q4: Following this code, what is the value of delta and eta?
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    int alpha = 5, beta = 2, gamma = 3, delta = 0, eta = 0;
if ((alpha > beta) && (alpha > gamma))
{
    if (alpha > delta)
    {
      delta += 1;
      eta += 2;
    }
    if (beta > delta)
    {
      delta += 1;
      eta += 2;
    }
}
if ((beta < gamma) && (beta <= delta))
{
    if (eta > gamma)
    {
      delta += 2;
      eta += 3;
    }
    else
    {
      delta += 3;
      eta += 4;
    }
}
    • delta = 1, eta = 2
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    • delta = 2, eta = 4
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    • delta = 4, eta = 7
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    • delta = 5, eta = 8
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    • delta = 6, eta = 9
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    5.

    Q5: Variables a, b, and c are all declared as characters. If a='A', b='B', c='C'; What is printed?
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    if (a < b) {
    if (a < c) {
      System.out.println("a is smallest");
    }
    else {
      System.out.println("c is smallest");
    }
}
else if (b < c) {
    System.out.println("b is smallest");
}
else
    System.out.println("clueless");
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    6.

    Q6: Variables a, b, and c are all declared as characters. If a='C', b='B', c='A'; What is printed?
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    if (a < b) {
    if (a < c) {
      System.out.println("a is smallest");
    }
    else {
      System.out.println("c is smallest");
    }
}
else if (b < c) {
    System.out.println("b is smallest");
}
else
    System.out.println("clueless");
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