Evaluation Conditionals-WE6-P1

Section 4.14 Evaluation Conditionals-WE6-P1

Subgoals for Evaluating Selection Statements.

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