What is the purpose of a Do While loop?

In most computer programming languages, a do while loop is a control flow statement that executes a block of code at least once, and then either repeatedly executes the block, or stops executing it, depending on a given boolean condition at the end of the block.

What is the advantage of do while?

A do-while loop is executed at least once. while (expression); This can be useful to write more readable code, although admittedly it gets used far less often then for and while loops and the potential of mixing it up with a while loop when skimming through code can actually make code less readable.

When should we use while and do while loop?

Both while and do-while loop are the iteration statement, if we want that first, the condition should be verified, and then the statements inside the loop must execute, then the while loop is used. If you want to test the termination condition at the end of the loop, then the do-while loop is used.

Do while loop is useful when we want that statement within the loop must be executed?

Explanation: in case the condition is true,the control goes back to beginning of loop.. this means that the statements inside the loop are executed before the condition is tested.so do while loop should be used in all scenarios where the loop body needs to be executed at least once.

What is an advantage of using for loop over while loop when working with arrays?

In a for loop, the index of iteration is always a clearly defined variable. By common practice, the variable is usually the letter i. This makes it easy to index one or more arrays by the index. For loops can easily be used to iterate through elements of multidimensional arrays using nested for loops.

What is the drawback of the Do-While loop?

While you’re guaranteed to have the instructions executed at least once before evaluating your exit condition. The disadvantage of these control structures that poses a serious problem is when you don’t include a way of changing your condition to a negative value to exit the loop ever, leading to an infinite loop.

Which statements is used to skip statements in a loop?

The break and continue statements are the jump statements that are used to skip some statements inside the loop or terminate the loop immediately without checking the test expression.

Which keyword is used to take the control to the beginning of the loop?

The statement that transfer control to the beginning of the loop is called continue statement.

What is the difference between for loop and while loop?

These statements are commonly called loops. Here, the main difference between a while loop and do while loop is that while loop check condition before iteration of the loop, whereas do-while loop, checks the condition after the execution of the statements inside the loop.

Do while vs for loop?

The while loop is used to repeat a statement or a group of statements while a given condition is true. It checks the condition before executing the statements inside the loop. The do while loop is similar to the while loop. But the condition is checked at the end of the execution of the statements inside the loop.

Why are while loops useful?

Like all loops,”while loops” execute blocks of code over and over again.

What is the syntax of DO WHILE LOOP?

As per the while loop syntax, the while loop includes a boolean expression as a condition which will return true or false. It executes the code block, as long as the specified conditional expression returns true.