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CS1 Python Subgoals

Section 4.4 Evaluate Conditionals-WE2-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 4.4.1 Conditionals-WE2-P1

Each question below is independent.
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Exercises Exercises

1.
Q7: What is the output of the following code?
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x = 0
if x = 0:  # look closely!
    print("0 is true")
else:
    print("0 is false")
  • 0 is true
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  • 0 is false
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  • There is no output because a compiler error occurs
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  • There is no output because an exception occurs
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2.
Q8: What is the output of the following code?
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if False:
    print("it is true")
else:
     print("it is false")
  • it is true
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  • it is false
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  • There is no output because a compiler error occurs
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  • There is no output because an exception occurs
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3.
Q9: What is the output of the following code?
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if 12 < 12:
    print("Never")
else:
    print("Always")
  • Never
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  • Always
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  • There is no output because a compiler error occurs
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  • There is no output because an exception occurs
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4.
Q10: What is the output of the following code?
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var1 = 15.0
var2 = 25.12
if 2 * var1 >= var2:
    print("O.K.")
else:
    print("Not O.K.")
  • O.K.
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  • Not O.K.
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  • There is no output because a compiler error occurs
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  • There is no output because an exception occurs
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5.
Q11: What is the output of the following code?
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a = 10
b = 5
c = 3
if b < c:
    print(c)
elif b < a:
    print(a)
else:
    print(b)
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