An exit-controlled loop is a loop where the controlling conditional expression is evaluated at the end of each iteration, as opposed to an entry-controlled loop where the expression is evaluated at the beginning of each iteration. The upshot is that an exit-controlled loop always executes at least one complete iteration whereas an entry-controlled loop might not iterate at all:
int x = 100;
// entry-controlled loop
while (x<50) { printf ("%d\n", x++); // won't execute at all because x<50 is false }
// exit-controlled loop
do {
printf ("%d\n", x++); // will execute one time only
} while (x<50);
The only loop that does not require an entry condition is the procedural goto loop: again: /*...*/ goto again; Although a do-while loop has no entry condition per-se, it still requires a mandatory entry condition into the second and all subsequent iterations. do { /*...*/} while (true); // mandatory entry condition into all but the 1st iteration And although a for loop's condition is optional, it is implicit: for (;;) {/*..*/} // implicit for ever loop for (;true;) {/*...*/} // explicit for ever loop
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. shreeradha@yahoo.com
a loop consist of data initialization;test condition;updation; example a for loop for(int a=1;a<5;a++) the loop will be executed 5 times four positives result and the last test condition will be failed and the loop will be exited there are many loops some of them are while loop,do...while loop,for loop,maybe more...... do while is an exit check loop and while and for are entry check loop.
If you meant 'what can be used' then it is statement break.
ENTRY - CONTROLLED LOOP EXAMPLEConsider the following code fragment::for(int a=1;a
The only loop that does not require an entry condition is the procedural goto loop: again: /*...*/ goto again; Although a do-while loop has no entry condition per-se, it still requires a mandatory entry condition into the second and all subsequent iterations. do { /*...*/} while (true); // mandatory entry condition into all but the 1st iteration And although a for loop's condition is optional, it is implicit: for (;;) {/*..*/} // implicit for ever loop for (;true;) {/*...*/} // explicit for ever loop
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. shreeradha@yahoo.com
The height of the loop depends on the entry speed The diameter is usually adjusted to provide 1g acceleration in the upward direction to the upside-down passengers. Technically, if the entry speed is the variable, and you don't worry about smashing the passengers or the g-forces, the loop can be ANY size.
The for and while statements are entry-controlled loops. The do-while statement is an exit-controlled loop.
An entry condition is a boolean expression (any expression that evaluates true or false) that is evaluated before each iteration of the loop executes. Although a for statement need not specify an entry condition, it is implied. Thus the following are all valid ways of defining an infinite loop: for (;;) {/*...*/} for (;true;) {/*...*/} while (true) {/*...*/} [Although the while (true) version is considered the most readable version, the for (;;) version is a well-established method of saying "for ever".] The do-while loop does not have an entry condition per-se because it always executes at least one iteration of the loop before evaluating the conditional expression. Thus the expression is an entry condition for the second and all subsequent iterations. The same can be said of a goto loop, but a goto loop need not specify an entry condition at all: again: /*...*/; goto again;
An exit-controlled loop is a loop where the controlling conditional expression is evaluated at the end of each iteration, as opposed to an entry-controlled loop where the expression is evaluated at the beginning of each iteration. The upshot is that an exit-controlled loop always executes at least one complete iteration whereas an entry-controlled loop might not iterate at all: int x = 100; // entry-controlled loop while (x<50) { printf ("%d\n", x++); // won't execute at all because x<50 is false } // exit-controlled loop do { printf ("%d\n", x++); // will execute one time only } while (x<50);
a loop consist of data initialization;test condition;updation; example a for loop for(int a=1;a<5;a++) the loop will be executed 5 times four positives result and the last test condition will be failed and the loop will be exited there are many loops some of them are while loop,do...while loop,for loop,maybe more...... do while is an exit check loop and while and for are entry check loop.
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.
If you meant 'what can be used' then it is statement break.
ENTRY - CONTROLLED LOOP EXAMPLEConsider the following code fragment::for(int a=1;a
I assume you're talking about the velcro loop on the front of the magellan or columbia shirts that have the logo. This loop is meant to hold your fishing rod when changing flies, lures, bait.
the term zero over head looping means that the processor can execute loops without consuming cycles to test the value of loop counter , perform a conditional branch to the top of the loop and decrement the loop counter.