Question at position 8 If the missing lines are filled in correctly, the program should continuously take in input a character which will be concatenated to a word. However, if the character entered is in the list of vowels, it is NOT included in the concatenation, and the program ends. Below is an example output of the program, where bolded text is input to the program: Enter a character: TEnter a character: HEnter a character: EWord: TH [table]
1 vowels = ['A', 'E', 'I', 'O', 'U']2 word = ''3 keep_running = True4 5 while keep_running:6 character = input('Enter a character: ')7 if character in vowels:8 # code WILL go inside IF9 # code MAY go here10 # …11 # …12 print('Word:', word)
[/table] Which of the following options is the correct missing code? (Code filled in has been bolded.) 7 if character in vowels:8 word = word + character9 else:10 keep_running = False7 if character in vowels:8 keep_running = False9 else:10 word = word + character7 if character in vowels:8 keep_running = False9 word = word + character7 if character in vowels:8 if keep_running:9 word = word + character10 else:11 keep_running = FalseClear my selection

Question

Question at position 8 If the missing lines are filled in correctly, the program should continuously take in input a character which will be concatenated to a word. However, if the character entered is in the list of vowels, it is NOT included in the concatenation, and the program ends. Below is an example output of the program, where bolded text is input to the program: Enter a character: TEnter a character: HEnter a character: EWord: TH [table]
1  vowels = ['A', 'E', 'I', 'O', 'U']2 word = ''3 keep_running = True4 5  while keep_running:6 character = input('Enter a character: ')7 if character in vowels:8 # code WILL go inside IF9 # code MAY go here10 # …11 # …12 print('Word:', word)
[/table] Which of the following options is the correct missing code? (Code filled in has been bolded.) 7  if character in vowels:8 word = word + character9 else:10 keep_running = False7 if character in vowels:8 keep_running = False9 else:10 word = word + character7 if character in vowels:8 keep_running = False9 word = word + character7 if character in vowels:8 if keep_running:9 word = word + character10 else:11 keep_running = FalseClear my selection

BlackTom AI · Accepted Answer

Reframing the scenario in my own words helps set up the evaluation: the program reads characters, appends non-vowels to the word, and stops when a vowel is entered. The missing code must implement this behavior inside the loop, using the existing variables vowels and word.

Option 1:
7     if character in vowels:
8         word = word + character
9     else:
10        keep_running = False
This option concatenates the input character to the word when the character is a vowel, which violates the requirement that vowels should not be included in the word. Moreover, it ends the loop only on non-vowels, which is the opposite of the intended behavior. In short, vowels are treated incorrectly and the loop exit condition is flipped.

Option 2:
7     if character in vowels:
8         keep_running = False
9     else:
10        word = word + character
Here, vowels cause the loop to stop, which aligns with the rule that entering a vowel ends the program. For non-vowels, the character is appended to the word, which is exactly what the description specifies. This option correctly implements both the stopping condition and the concatenation behavior.

Option 3:
7     if character in vowels:
8         keep_running = False
9     word = word + character
This one ends the loop when a vowel is entered, as desired, but it unconditionally appends every input character to the word, including vowels. Since vowels should not be included in the final word, this option violates the core requirement by mutating word with a vowel.

Option 4:
7     if character in vowels:
8         if keep_running:
9             word = word + character
10        else:
11            keep_running = False
This option introduces an extra conditional that checks keep_running inside the vowel branch, potentially allowing a vowel to be appended only if keep_running is true, which complicates the straightforward rule. It also risks appending vowels to the word (depending on the state), contradicting the stated behavior that vowels are not added. The logic becomes unnecessarily tangled and does not clearly implement the simple stop-on-vowel rule plus append-on-non-vowel rule.

Overall, the clear, correct alignment with the described behavior is option 2, which stops the loop when a vowel is entered and appends non-vowel characters to word, leaving the intended flow intact.

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