Evaluation Conditionals-WE6-P1

Section 4.14 Evaluation Conditionals-WE6-P1

Subgoals for Evaluating Selection Statements.

Diagram which statements go together by indentation
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For conditional, determine whether expression is true
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1. If true, follow true branch
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1. If false, follow next elif/else branch or exit conditional if no else branch
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Repeat step 2 as necessary
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Subsection 4.14.1

Exercises Exercises

1.

Q16: Click on the if-statement that must be TRUE in order to execute the line e = 3 in the following code.

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if x > y:
    if a > b:
        e = 1
    else:
        e = 2
else:
    if a < b:
        e = 3
    else:
        e = 4

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2.

Q17: Click on the if-statement that must be FALSE in order to execute the line e = 2 in the following code.

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if x > y:
    if a > b:
        e = 1
    else:
        e = 2
else:
    if a < b:
        e = 3
    else:
        e = 4

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Use this given setup for each of the questions below.

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alpha = 2
beta = 1
delta = 3
eta = 0
gamma = 0
omega = 2.5
theta = -1.3
kappa = 3.0
lambda_ = 0.0
rho = 0.0

3.

Q18: After executing the following code, the value in variable eta is .

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if omega > kappa:
    if alpha > delta:
        eta = 5
    else:
        eta = 4
else:
    if alpha < delta:
        eta = 3
    else:
        eta = 2

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4.

Q19: After executing the following code, the value in variable a is and the value in variable b is .

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a = -5
b = 5
if a < 0:
    if b > 0:
        a = b
else:
    a = b + 10
    b = b + 3

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5.

Q20: After executing the following code, the value in variable x is and the value in variable y is .

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x = -8
y = 10
if x < 0:
    if y < 0:
        x = y
else:
    x = y + 10
    y = x + y

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