A ________ - controlled loop is terminated if it encounters a special value.Group of answer choicescountboth are correctsentinelboth are wrong
Question
A ________ - controlled loop is terminated if it encounters a special value.
Group of answer choices
- count
- both are correct
- sentinel
- both are wrong
Solution
In programming, a loop that is controlled by a special value to determine when it should stop executing is typically referred to as a sentinel-controlled loop. This kind of loop continues iterating until it encounters a sentinel value, which is a pre-defined value that signifies the end of the loop's execution.
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Sentinel-Controlled Loop: This loop stops when it receives a specific value (the sentinel) that is not part of the regular data set being processed. For example, if you're reading numbers and you use the value -1 as a sentinel, the loop will terminate when -1 is encountered.
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Count-Controlled Loop: This loop continues for a specified number of iterations, rather than until a condition is met.
Considering the choices provided, the correct answer is sentinel. In the context of the given question, while "count" could also be seen as a type of loop, it does not fit the description of being terminated by a special value. Hence, saying both are correct is inaccurate, and the correct term is “sentinel.”
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