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Do-While Loop in Iterative Control Structures

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Do-While Loop in Iterative Control Structures

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Questions and Answers

In a do-while loop, when is the test for continuation carried out?

When the loop is executed for the last time
At the end of each pass through the loop (correct)
When the loop is executed for the first time
At the beginning of each pass through the loop

Which control structure guarantees that its statement will always be executed at least once?

do-while loop (correct)
while loop
for loop
if-else statement

What is the difference between a while loop and a do-while loop?

A do-while executes zero or more times, while a while may never execute
A do-while always executes once, while a while executes zero or more times
A do-while always executes once, while a while may never execute
A do-while executes one or more times, while a while may never execute (correct)

In a do-while loop, when does the evaluation of the control condition occur?

After executing the statements in the loop (D) Signup and view all the answers

What type of flowchart represents the control condition in a do-while loop?

False-true flowchart (A) Signup and view all the answers

What is guaranteed in a do-while loop that may not occur in a while loop?

Execution of statements at least once (C) Signup and view all the answers

Study Notes

Control Structures

In a do-while loop, the test for continuation is carried out after the loop body is executed.
The do-while loop guarantees that its statement will always be executed at least once.
The main difference between a while loop and a do-while loop is that a while loop evaluates the condition before executing the loop body, whereas a do-while loop evaluates the condition after executing the loop body.
In a do-while loop, the evaluation of the control condition occurs at the end of the loop.
A diamond-shaped flowchart represents the control condition in a do-while loop.
In a do-while loop, it is guaranteed that the loop body will be executed at least once, which may not occur in a while loop.

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Description

This quiz covers the do-while loop, a type of iterative control structure in programming. It compares the do-while loop with the while loop, highlighting the differences in their test for continuation and the guarantee of statement execution. The quiz also discusses the flowchart statement and the sequence of steps in the do-while loop.