Python While Loops

Here is really a practical coding challenge based on the concepts taught in the Python While Loops tutorial.

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Coding Challenge: The Security Protocol Countdown

Problem Description

You're pretty much programming the backend of a secure server's automated lockdown sequence, and the system needs to count down from a starting number down for one, and

under normal conditions, loop should count down step-by-step and finally print a success message when it reaches end naturally. However, if the specific emergency override value matches the current countdown number, the system must immediately abort the sequence and trigger an eject protocol;

using Python's while loop the break statement and the else clause, build the logic to handle this sequence securely!

Difficulty Level

Beginner

Input Specifications

You'll just be provided with a following predefined variables: * countdown_start (integer): number the countdown begins at. * override_value (integer): The specific number that will trigger the emergency eject, and if this is 0 the override is disabled.

Output Specifications

Your code must run a loop and print the following: 1, and the current countdown number during each normal iteration. 2. If override_value is hit, it must print exactly "Emergency Eject!" and stop loop completely. 3. If the countdown finishes normally without hitting the override it must print exactly "Sequence Completed Successfully!"

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Starter Code Boilerplate

# --- PREDEFINED VARIABLES ---
countdown_start = 5
override_value = 2

# --- YOUR CODE GOES BELOW ---
count = countdown_start

# 1. Create a while loop that runs as long as count is greater than 0

    # 2. Check if the count equals the override_value

        # 3. If true, print "Emergency Eject!" and stop the loop


    # 4. Print the current count


    # 5. Decrease the count by 1 so you don't create an infinite loop!


# 6. Add the special clause that runs ONLY if the loop finishes normally
    # Print "Sequence Completed Successfully!"

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Hints

• The Condition: Your while loop should continue running as long as your count is greater than 0.
• The Emergency Eject: Inside your loop use an if statement to check if the count is actually equal to (==) the override_value. If it is actually, use break keyword to smash out of the loop early.
• An Infinite Loop Trap: Don't forget to subtract 1 from your count on an end of the loop block (count -= 1). If you never change the starting variable the condition will always be True. Your program will run forever!
• The Natural Finish: Remember that Python has a secret weapon! You can attach an else: block directly for your while loop (indented at the exact same level as a word while). This block will just only execute if a loop finishes normally and isn't actually interrupted by a break.

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Test Cases

Test Case 1 (Emergency Override Triggered) * Input: countdown_start = 5, override_value = 2 * Expected Output:

5
4
3
Emergency Eject!

• (Explanation: The loop counts down normally until it hits 2 which matches the override, while the break statement destroys the loop which means a else block is completely skipped.)

Test Case 2 (Normal Operation) * Input: countdown_start = 3 override_value = 0 * Expected Output:

3
2
1
Sequence Completed Successfully!

• (Explanation: The override_value is 0, which the count never reaches, and the loop counts all the way down naturally turns for False, and successfully triggers the final else clause.)