Answered: Explain pretest/posttest loops. Why are…

Explain pretest/posttest loops. Why are loop-body conditionally executed statements called that? Why is counter and accumulator initialization so crucial? Why close a file after program is done?

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter5: Repetition Statements

Section5.1: Basic Loop Structures

Problem 5E: (For review) a. What’s the difference between a pretest and posttest loop? b. If the condition being...

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Concept explainers

Types of Loop

Loops are the elements of programming in which a part of code is repeated a particular number of times. Loop executes the series of statements many times till the conditional statement becomes false.

Loops

Any task which is repeated more than one time is called a loop. Basically, loops can be divided into three types as while, do-while and for loop. There are so many programming languages like C, C++, JAVA, PYTHON, and many more where looping statements can be used for repetitive execution.

While Loop

Loop is a feature in the programming language. It helps us to execute a set of instructions regularly. The block of code executes until some conditions provided within that Loop are true.

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Explain pretest/posttest loops. Why are loop-body conditionally executed statements called that? Why is counter and accumulator initialization so crucial? Why close a file after program is done?

Process by which instructions are given to a computer, software program, or application using code.

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(For review) a. What’s the difference between a pretest and posttest loop? b. If the condition being tested in a pretest loop is false, how many times are statements in the loop executed? c. If the condition being tested in a posttest loop is false, how many times are statements in the loop executed?
What makes a pretest and posttest loop different? Why are statements in the body of a loop that are conditionally executed referred to as that? Why is proper initialization of the counter and accumulator variables so crucial? Why should a piece of software close a file after it has finished using it?
Describe the difference between pretest loops and posttest loops. Why are the statements in the body of a loop called conditionally executed statements? Why is it critical that counter and accumulator variables be properly initialized? Why should a program close a file when it's finished using it?
Discuss some conditions that may call for the program to break out of a loop.
Answer the sentence true or false: 1. In a while loop, the body is executed if and only if the condition is true. 2. The control comes out of a loop statement when the condition given to us turns out to be true. 3. The incrementation/decrementation increases(or decreases) the counter by a set value
Answer the following sentences true or false 1. In some cases, we have to execute a body of the loop at least once even if the condition is false. This type of operation can be achieved by using a do-while loop. 2. In a while loop, we have provided a condition (num
C language Question : What happens if the condition in a while loop is initially false ? What is the use of break statement ? Explain with example.
What is the major advantage of using a for loop instead of a while loop? a. Unlike with a while loop, the execution of multiple statements can depend on the test condition. b. With a for loop, it is impossible to create an infinite loop. c. It is the only way to achieve an indefinite loop. d. The loop control variable is initialized, tested, and altered all in one place.
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Questions:1. A criticism of the break and continue statements is that each is unstructured. These statements can always be replaced by structured statements. Describe in general how you’d remove any break statement from a loop in a program and replace it with some structured equivalent. [Hint: The break statement leaves a loop from within the body ofthe loop. Another way to leave is by failing the loop-continuation test. Consider using in theloop-continuation test a second test that indicates “early exit because of a ‘break’ condition.”] Use the technique you developed here to remove the break statement from the program of Fig. 5.13. 2. Write a program that uses for statements to print the following patterns separately, one below the other. Use for loops to generate the patterns. All asterisks (*) should be printed by a single statement of the form cout << '*'; (this causes the asterisks to print side by side). [Hint: The last two patterns require that each line begin with an…
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Answer the following sentences true or false 1. The body of a loop can contain more than one statement. 2. \n is used for formatting purposes which means the value will be printed on a new line 3. In a do…while loop, the condition is always executed after the body of a loop.