What can a while loop do that a for loop Cannot?

What can a while loop do that a for loop Cannot?

Explicit flow control inside the while loop permits execution that a for loop (with internal init; and modify; statements) can not recreate. While loop does not have as much flexibility as a for loop has and for loops are more readable than while loops.

Is it possible to use a for in place of a while loop and vice versa?

Yes they can. You can translate a for loop with initial condition, checking condition and step in a very same while loop a vice versa. You can even translate a while(true) loop to a for loop as “for (;;;) “.

Can every while loop be replaced with a for loop Why or why not?

You can always convert a for loop to a while loop. You can always convert a while loop to a for loop. The while loop and the do loop are equivalent in their expressive power; in other words, you can rewrite a while loop using a do loop, and vice versa.

In what situations is a do while () loop preferred over a while () loop?

This kind of loop is most often used when the test doesn’t make any sense until the statements have been performed at least once. For most purposes, the while loop is preferable. For example, the user can be asked for a password by: String input; do { System.

Do While loop do not execute the statement while condition is false?

If the condition is true the code within the block is executed again. This repeats until the condition becomes false. Because do while loops check the condition after the block is executed, the control structure is often also known as a post-test loop. If it is true, the code executes the body of the loop again.

Why we use do while loop?

Using the do-while loop, we can repeat the execution of several parts of the statements. The do-while loop is mainly used in the case where we need to execute the loop at least once. The do-while loop is mostly used in menu-driven programs where the termination condition depends upon the end user.

Can we use while loop in place of for loop?

All for loops can be written as while loops, and vice-versa. Just use whichever loop seems more appropriate to the task at hand. In general, you should use a for loop when you know how many times the loop should run.

What can always be used instead of a for loop?

All for loops can be written as while loops, and vice-versa. Just use whichever loop seems more appropriate to the task at hand. If you want the loop to break based on a condition other than the number of times it runs, you should use a while loop.

Why is do while better than while?

While and do while differ only in the first execution when condition is false. If you ignore this difference it boils down to the place of condition check, in while the condition is checked and if it is true the statements are executed. In the do while the condition check is executed after the block execution.

Why do while loops are bad?

The principal complaint about while loops is that they may never end: while (true) { } This is the infinite loop. If it ever happens that you construct an infinite loop in code, that code will become non-responsive at run time.

What is a while loop in C++?

A while loop is sometimes called a pre-test loop. The body of the while loop only runs if the value of the condition is true. In certain structures, this can be beneficial, to verify that the code inside the loop needs to run in the first place. The misplaced semicolon can create problems with a while loop.

Are there any while loops that cannot be done in for-loop?

There are definitely while loops that cannot be done in any “for” loop with a fixed finite number of iterations. See for example http://en.wikipedia.org/wiki/Collatz_conjecture where the termination condition (N becoming 1) has not been proven to always occur.

What are the risks and errors in looping structures in C?

In this lesson, you will learn about some of the most common risks and errors in looping structures in a C program. These mistakes result in running an infinite loop or never-ran loops that give incorrect output. A few guidelines are also explained how to avoid these mistakes. Updated: 08/19/2021 The C language has three looping control structures.

How many types of loops are there in C language?

The C language has three looping control structures. The for loop, the while loop, and the do while loop. The potential risks and errors can be divided into two broad categories: problems with the loop control (running the loop wrong number of times), and problems with the loop actions (producing the wrong output).