Difficulty: Easy

Average Score: 91%

What is one task that could be accomplished using a while loop?

Rationale

A user is asked to enter a password repeatedly until either a correct password is entered or five incorrect attempts have been made.

A while loop is designed to execute a block of code repeatedly as long as a specified condition remains true. In this scenario, the loop continues to prompt the user for password input until the correct password is provided or a maximum of five attempts is reached, effectively utilizing the repeat-until logic that while loops facilitate.

A (The user inputs an integer, and the program prints out whether the number is even or odd and whether the number is positive, negative, or zero.) YOUR ANSWER

This task can be accomplished using a simple if-else statement, as it requires only a single evaluation of the input number rather than repetition. A while loop is unnecessary here since the task does not involve repeated actions based on a condition.

C (When the user inputs a number, the program outputs 'True' when the number is a multiple of 10.) YOUR ANSWER

Similar to option A, this task can be effectively executed with an if statement to check for divisibility. It does not require a loop because it only processes the input number once, making a while loop superfluous.

D (After inputting two numbers, the program prints out the larger of the two.) YOUR ANSWER

This task can also be completed with a straightforward if-else structure to compare the two numbers. A while loop is not applicable here since the comparison occurs only once, thus not involving any repetition.

Conclusion

While loops are particularly suited for scenarios requiring repetitive actions based on conditions. In this case, option B exemplifies a situation where user input is continually requested until specific criteria are met, making it the correct answer. The other options involve single instances of input evaluation, rendering them unsuitable for a while loop's intended purpose.

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