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Chapter 5: Problem 5

Which loop should you use in situations where you wish the loop to repeat until the test expression is false, and the loop should not execute if the test expression is false to begin with?

Short Answer

Expert verified
Answer: The most suitable loop type in this scenario is the "while loop," as it continuously checks the test expression before each iteration and stops when the expression becomes false.

Step by step solution

01

Analyze the Options

There are two main types of loops: the "for loop" and the "while loop." Analyze how each loop works and determine which of them best matches the requirements of the exercise.
02

The For Loop

The "for loop" is typically used to iterate over a sequence of items and execute a block of code for each item. With a "for loop," you know the number of iterations that the loop will execute in advance. This type of loop does not meet the requirements of the exercise, as it does not rely on a test expression being true or false but on a pre-set number of iterations.
03

The While Loop

The "while loop" executes a block of code repeatedly as long as a test expression is true. If the test expression is false from the beginning, the loop will not execute at all. This behavior perfectly matches the requirements of the exercise.
04

Conclusion

In situations where you wish for the loop to repeat until the test expression is false and not execute if the test expression is false to begin with, you should use the "while loop." This loop type is the most appropriate choice in this scenario, as it continuously checks the test expression before each iteration and stops when the expression becomes false.

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Most popular questions from this chapter

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