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20 Cards in this Set
- Front
- Back
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Loop |
can be used to tell a program to execute statements repeatedly repeated executions of a block of statements |
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loop continuation condition |
a boolean expression that controls the execution of the body |
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While loop |
executes statements repeatedly while the condition is true if evaluation is false, entire loop terminates pretest loop because the continuation condition is checked before the loop body is executed |
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syntax for while loop |
while (loop-continuation-condition) { //loop body Statement(s); } |
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counter controlled loop |
you know how many times the loop body needs to be executed because the control variable count is used to count the number of executions |
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infinite loops |
make sure the loop continuation condition eventually becomes false so that loop will terminate |
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off-by-one-error |
programmer often make the mistake of executing a loop one more or less time |
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sentinel value |
signifies the end of the input |
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do while loop |
executes the loop body first and then checks the loop continuation condition if evaluation is true, the loop body is executed again, if it is false, the do while loop terminates posttest loop because the condition is checked after the loop body is executed |
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do while loop syntax |
do { //loop body Statement(s); } while (loop continuation condition); |
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for loop |
has a concise syntax for writing loops pretest loop because the continuation condition is checked before the loop body is executed |
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for loop syntax |
for (initial action; loop continuation condition action after each iteration) { //loop body; Statement(s); } |
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iteration |
a one time execution of a loop body (repetition) |
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control variable |
a for loop generally uses a variable to control how many times the loop body is executed and when the loop terminates |
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initial action |
initializes a control variable |
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action after each iteration |
increments or decrements the control variable |
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loop continuation condition in for loop |
tests whether the control variable has reached a termination value |
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nested loop |
consist of an outer loop and one or more inner loops each time the outer loop is repeated, the inner loops are reentered and started anew |
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break |
immediately ends the innermost loop, which contains the break |
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continue |
ends the current iteration |
