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Chapter 5: Problem 24

The __________ and __________ loops will not iterate at all if their test expressions are false to start with.

Short Answer

Expert verified
Answer: The two loops that will not iterate at all if their test expressions are false at the beginning are the "while" loop and the "for" loop. This is because their test expressions act as a condition for the loops to execute. If the condition (test expression) is not met from the start, the loops will not run and the statements inside them will not be executed.

Step by step solution

01

Identify the two loops

The two loops in question are the "while" loop and the "for" loop.
02

Explain the "while" loop

A "while" loop executes a block of code as long as the test expression (condition) is true. If the test expression is false from the start, the statements inside the loop will not be executed at all, since the condition is not met. Here's a generic example: ``` while (test_expression) { // Statements inside the loop } ```
03

Explain the "for" loop

A "for" loop also uses a test expression (condition) to determine whether the loop should continue executing. However, it initializes a counter variable, tests the expression, and updates the counter variable within the same statement, separated by semicolons. If the test expression is false from the start, the statements inside the loop will not be executed at all, just like in the "while" loop. Here's a generic example: ``` for (initialization; test_expression; increment) { // Statements inside the loop } ```
04

Conclusion

In summary, both "while" and "for" loops will not iterate at all if their test expressions are false from the start. This is because the test expressions act as a condition for the loops to execute, and if the condition is not met, the loops will not run.

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Most popular questions from this chapter

T \(\mathrm{F}\) A variable may be defined in the initialization expression of the for loop.

T \(\mathrm{F}\) Variables may be defined inside the body of a loop.

Why is it critical that accumulator variables be properly initialized?

Why should you indent the statements in the body of a loop?

Which loop should you use when you know the number of required iterations?
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