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CS1 Python Subgoals

Section 4.6 Evaluate Conditionals-WE3-P1

Subgoals for Evaluating Selection Statements.

  1. Diagram which statements go together by indentation
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  2. 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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  3. Repeat step 2 as necessary
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Subsection 4.6.1 Conditionals-WE3-P1

Each question below is independent, but they all use this given setup
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a = 1
b = 0
c = 5

Exercises Exercises

1.
Q12: What is the only numerical value that has a truthiness of False?
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  • No numerical values have a truthiness of False
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  • All numerical values have a truthiness of False
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2.
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3.
Q14: Enter the value of each variable after the following code is executed:
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if a + c:
    c = 12
    if c - a:
            a = 1
if b:
    a = b
elif a - a:
    a = c
else:
    a = 13
The value of variable a is , the value of variable b is , and the value of variable c is .
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4.
Q15: What is the output of the following code?
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if b >= c:
    if b >= a:
        print("b")
    elif a >= c:
        print("a")
elif b >= a:
    print("c")
elif a >= c:
    print("a")
else:
    print("c")
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5.
Q16: What is the output of the following code?
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if c == 2*a:
    print("double")
elif c == 3*a:
    print("triple")
elif c == 4*a:
    print("quadruple")
elif c == 5*a:
    print("quintuple")
else:
    print("unknown")
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