Comparison between the While Loop and the Do While Loop
Programs use “iterative” statements to run the same code repeatedly. While and do while are iterative statements that can be used in C, C++, Java, and other languages. Iterative statements are also called looping statements. The control statement is run in a while loop before the loop body. In a do-while loop, it is run after the loop body. This is what makes while and do while difference between them .
This article will talk about the two looping statements while and do while and what makes them different from each other. In the following sections, we’ll look at how while and do while loops are different based on a few factors.
Understanding the Basics : While and do while difference
| Feature | Description |
|---|---|
while Loop | The while loop is a fundamental construct in programming, where a condition is evaluated before the loop body executes. If the condition is true, the loop continues. |
do-while Loop | The do-while loop, on the other hand, guarantees that the loop body executes at least once before evaluating the condition. It checks the condition after the first iteration. |
Loop Execution Logic
| Execution Logic | Description |
|---|---|
while Loop | In a while loop, if the initial condition is false, the loop body may not execute at all. It checks the condition before entering the loop, making it a pre-test loop. |
do-while Loop | The do-while loop ensures that the loop body executes at least once, irrespective of the initial condition. It checks the condition after the first iteration, making it a post-test loop. |
What’s Different About While and Do While Loops?
There are some similarities between while loops and do while loops, such as using iterative statements to reduce the amount of work and time needed to run a program. However, there are also some differences between the two. We need to understand these difference between while and do while to use the right loop expression for our needs. Let’s look at the differences between while loops and do while loops in the programming languages C and C++.
Difference Between While and Do While: What is a while loop?
The difference between the While Loop and the Do While Loop shows this. Let’s take a quick look at what a while loop is. If the condition is true, the ability to repeat a phrase or group of words is given. If the condition is never changed, the while loop will run forever, which is not what you want. It runs as long as the condition is true.
A while loop is often called a top-checking loop because the control condition is on the first line of code. If the control condition is false, the statements inside the loop will never be done.
Difference Between While and Do While: What is a Do While Loop?
It’s like the while loop, but the difference between while and do-while in c at the end of the loop. This means that the body of the loop is run at least once before the condition is checked.
The do-while loop is bottom-checking because the control statement comes after the loop’s body—another difference between do-while loops and while loops are that do-while loops run at least once.
Do while and while difference with example?
In either case, the assertions will run once in the do-while loop. If the test expression inside the while loop evaluates to false, the loop will end, and the statements inside the while loop will not be run. Since the condition of the do-while loop is checked at the end of the loop, you can be sure that its statements will run at least once.
The statements inside the do-while loop run only once, and then the condition is checked. So, the do-while loop condition has nothing to do with the first time the do-while loop statements are run. After the statements in the do-while loop have been run once, the condition is checked. If the condition is true, the do-while loop will keep running its commands until it is no longer true.
What is the difference between while and a do-while loop in Java?
At the start of each iteration, the while loop in Java checks the loop continuation condition and runs one or more statements on the difference between while and do-while loop, for example. The do-while loop, on the other hand, checks to see if the loop should continue after the first time through. So, the do-while loop guarantees that the logic will be run once, while the while loop does not. The while loop statement will never be run in the example given above. The do-while loop, on the other hand, will only run once.
FAQs About Difference Between While and Do While:
Where can I get an explanation of the difference between while loops and do while loops?
In a while loop, the condition is validated before any statements are carried out, whereas in a do-while loop, statements must be carried out at least once before the condition can be validated after any statements have been carried out. This is the primary distinction between the two types of loops.
Based on the method used, what is the difference between while loops and do while loops?
The execution of the loop body in a while loop is done using a top-down technique, which is different from the do-while loop, which uses a bottom-up approach. This is the primary distinction between the two types of loops. On the other hand, the do-while loop implements a bottom-up strategy for executing a loop body.