Question at position 9 If the missing lines are correctly filled in, the program should continuously ask the user for a number until the user enters a number below zero where the program will give a warning. If they enter a number below zero again at any point after their warning, the program will stop. Below is an example output of the program, where bolded text is input to the program: Enter number: 4Valid!Enter number: -1Warning!Enter number: 0Valid!Enter number: -2 [table] 1 warning_given = False2 keep_running = True3 4 while keep_running:5 number = int(input('Enter number: '))6 if # ( code WILL go here ) :7 if # ( code WILL go here ) :8 keep_running = False9 else:10 warning_given = True11 print('Warning!') 12 else:13 print('Valid!') [/table] Which of the following options is the correct missing code? (Code filled in has been bolded.)6 if warning_given:7 if number = 0: 7 if warning_given:6 if number

Question

Question at position 9 If the missing lines are correctly filled in, the program should continuously ask the user for a number until the user enters a number below zero where the program will give a warning. If they enter a number below zero again at any point after their warning, the program will stop. Below is an example output of the program, where bolded text is input to the program: Enter number: 4Valid!Enter number: -1Warning!Enter number: 0Valid!Enter number: -2 [table]
1  warning_given = False2 keep_running = True3 4  while keep_running:5 number = int(input('Enter number: '))6 if # ( code WILL go here ) :7 if # ( code WILL go here ) :8 keep_running = False9 else:10 warning_given = True11 print('Warning!') 12 else:13 print('Valid!')
[/table] Which of the following options is the correct missing code? (Code filled in has been bolded.)6 if warning_given:7 if number < 0:6 if number >= 0: 7  if warning_given:6 if number < 0:7 if not warning_given:6 if number < 0: 7  if warning_given:Clear my selection

BlackTom AI · Accepted Answer

We start by understanding the intended control flow inside the loop. The code structure shows a nested if: the outer if at line 6 leads to an inner if at line 7, and based on the inner condition either stops the loop or sets a warning and prints a message. This implies that when the user enters a negative number, we first check whether a prior warning has already been issued. If there has been a previous warning, we should stop the loop; otherwise, we should issue a warning and continue. Option 1 (A): 6 if number < 0: 7 if warning_given: This arrangement matches the described logic: the outer check tests for a negative number; the inner check then tests if a prior warning has already been given. If a warning was already given, the loop stops (keep_running = False on line 8). If not, the code proceeds to the else branch to set warning_given = True and print the Warning!, aligning with the intended behavior. The sequencing aligns with the lines shown for warning emission and the stop condition. Option 2 (B): 6 if number >= 0: 7 if warning_given: Here, the outer condition checks for number >= 0, which would trigger the inner branch only when a non-negative number is entered. That contradicts the requirement that the negative number triggers the warning or possible stop. Since the example behavior centers on handling negative inputs for warnings, this choice misstates when the check should occur. Option 3 (C): 6 if number < 0: 7 if not warning_given: This version uses a negated condition in the inner if (not warning_given). While this might seem to handle the first negative input by warning, it flips the intended gating: the code path would only stop when a negative number is entered and there has not yet been a warning, which is inconsistent with the provided structure where the inner if should reference whether a warning has already been issued (warning_given). The actual stop condition should depend on whether a warning was already issued, not on whether there was no prior warning. Option 4 (D): 6 if number < 0: 7 if warning_given: The outer test is correct for negative input, but the inner test’s alignment with the rest of the block is off due to spacing and indentation in the presented options. While the logic of stopping after a prior warning is present, this exact arrangement would change how and when the stop condition is checked in relation to the warning flag, potentially altering the flow compared to the expected structure. Across all options, the core concept to compare is how the program decides to stop versus issue a warning when a negative number is entered, and how that decision depends on whether a warning has already been given. The most faithful fit to the described behavior is the option that nests the inner check under the outer check for a negative input and uses the warning_given flag to determine whether to stop or warn, ensuring the sequence aligns with printing 'Warning!' only on the first negative input and stopping on a subsequent negative input after the warning.

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