What is the difference between entry and exit controlled loops - in Java?

Answer 1

while loop and for loop are entry controlled loops as they check looping condition at the entry point.

do while loop is exit controlled loop as it checks looping condition at exit point.

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Answer 2

In Entry controlled loop the test condition is checked first and if that condition is true than the block of statement in the loop body will be executed while in exit controlled loop the body of loop will be executed first and at the end the test condition is checked,if condition is satisfied than body of loop will be executed again.

Answer 3

In Entry controlled loop the test condition is checked first and if that condition is true than the block of statement in the loop body will be executed while in exit controlled loop the body of loop will be executed first and at the end the test condition is checked,if condition is satisfied than body of loop will be executed again.

Answer 4

An entry control loop places the conditional expression that terminates the loop at the start of the loop, where it is evaluated before each iteration of the loop. If the expression initially evaluates false, then the loop does not iterate at all and control passes to the next statement following the loop.

An exit control loop places the conditional expression at the end of the loop, where it is evaluated after each iteration of the loop. This means that the loop always iterates at least once.

Generally, exit control loops are best avoided as conditional expressions are ideally placed up front where they can be seen. This helps make code easier to read and thus easier to maintain. However, there will inevitably be cases where an exit control loop helps to express the logic more clearly.

In C there are 3 ways to define a structured iterative loop, using the for, while and do-while statements. Although for and while loops are entry control loops and do-while is an exit control loop, conditional expressions may also be placed anywhere in the body of the loop itself, thus it is possible for a loop to be both entry control and exit control. However, to aid readability and maintainability, it is best to place the conditional expression up front whenever possible.

Answer 5

With an entry control loop, the condition that must be satisfied is evaluated before we enter the loop and each time we start a new iteration of the loop. If the condition is not satisfied upon entry, the loop does not execute.

With an exit control loop, the condition must be satisfied at the end of each iteration before we can begin a new iteration. An exit control loop always executes at least one iteration.

Answer 6

In an entry-condition loop, the condition is evaluated before the start of each iteration and if the condition is false then the body of the loop does not execute at all. In an exit-condition loop, the condition is evaluated at the end of each iteration thus the loop body must execute at least once.

Answer 7

It is an Entry controlled loop.