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Java Loops and Their Types

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@SelfDeterminationGrossular

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Questions and Answers

What type of repetition involves terminating the execution of a block after a fixed number of times?

Sentinel-controlled repetition

Counter-controlled repetition (correct)

Indefinite repetition

Infinite repetition

Which of the following are types of loops provided by Java? (Select all that apply)

while (correct)

foreach

for (correct)

do-while (correct)

What are loops used for in programming?

Repeated execution of one or more statements until a terminating condition is reached.

The while loop evaluates the condition after the loop executes.

False Signup and view all the answers

What is the purpose of a sentinel value in programming loops?

To indicate the end of data entry or termination of the loop. Signup and view all the answers

Match the following loop types with their descriptions:

For loop = Used for a fixed number of iterations While loop = Evaluates condition before execution Do-while loop = Executes at least once before condition check Sentinel-controlled loop = Continues until a specific value is encountered Signup and view all the answers

What common error occurs when writing a while loop for counter-controlled repetition?

Using the wrong comparison operator, like '=' instead of '<'. Signup and view all the answers

Study Notes

Counter-Controlled Repetition

Terminating the execution of a block after a fixed number of times is called counter-controlled repetition.

Types of Loops in Java

for
while
do-while

Purpose of Loops

Loops are used for repeating actions in programming.

while Loop Evaluation

The while loop evaluates the condition before the loop executes, not after.

Sentinel Value

A sentinel value is used to signal the end of input in a loop.

Loop Types

for loop: used for counter-controlled repetition.
while loop: used for indefinite repetition, where the number of iterations is unknown.
do-while loop: also used for indefinite repetition, but it guarantees that the loop body executes at least once.

Common While Loop Error

A common error in while loops for counter-controlled repetition is forgetting to update the loop control variable, leading to an infinite loop.

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Description

This quiz covers the basics of loops in Java, focusing on counter-controlled and sentinel-controlled repetition. It's designed to test your understanding of for, while, and do-while loop statements. Enhance your programming skills by mastering these essential concepts!