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CS1 Python Subgoals

Section 6.6 Evaluate Conditionals-WE3-P1

Subgoals for Evaluating a Loop.

  1. Determine Loop Components
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    1. Start condition and values
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    2. Iteration variable and/or update condition
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    3. Termination/final condition
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    4. Body that is repeated based on indentation
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  2. Trace the loop, writing updated values for every iteration or until you identify the pattern
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Subsection 6.6.1 Evaluate Loops-WE3-P1

Exercises Exercises

1.
Q11: Put the code in the right order to create a program that will continue to generate integers between 1 and 100 (inclusive) until the value generated is less than 6 or greater than 95. Print the numbers generated.
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2.
Q12: What is the output of the following code if the user enters -10, 100, 101, 54, 1, 98, 0?
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num_bad_inputs = 0
num = int(input("Input a number between 1 and 100: "))
while num < 1 or num > 100:
    num_bad_inputs += 1
    num = int(input("Input a number between 1 and 100: "))
print("failed inputs: " + num_bad_inputs)
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3.
Q13: What is the output of the following code if the user enters 12 18 49 36 50 -1?
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evens = 0
odds = 0
num = int(input("Enter a number: "))
while num > 0 and num < 50:
    if num % 2 == 0:
        evens += 1
    else:
        odds += 1
    num = int(input("Enter a number: "))
print(evens + "even(s) entered and " + odds + " odd(s) entered")
  • 3 even(s) entered and 2 odd(s) entered
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  • 3 even(s) entered and 1 odd(s) entered
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  • 4 even(s) entered and 2 odd(s) entered
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  • 4 even(s) entered and 1 odd(s) entered
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  • Compiler Error
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4.
Q14: What is the output of the following code if the user enters 98 68 82 77 45 100 104?
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sum = 0
num_scores = 0
num = int(input(“Score: ”))
while num >= 0 and num <= 100:
    sum += num
    num_scores += 1
    num = int(input(“Score: ”))
print(sum / num_scores)
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5.
Q15: What is the output of the following code?
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a = 10
b = 5
counter = 1
while counter < a or counter < b:
    if counter % 2 == 0:
        counter *= 2
    else:
        counter += 1
print(counter)
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