Loop invariants can be used to:
document your code
check them by making explicit assert calls (available in most languages C, Java, Python, Pascal...)
prove correctness
In computer science, a loop invariant is a property of a program loop that is true before (and/or after) each iteration.
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A loop invariant is a ________ __________, sometimes checked within the code by an assertion call.
A loop invariant is a logical assertion, sometimes checked within the code by an assertion call.
Loop Invariant to prove correctness requires three steps:
Initialization (basis): it is true prior to the first iteration
Maintenance (step): If it is true before an iteration of the loop, it remains true before the next iteration.
Termination:When the loop terminates, the invariant gives us a useful property th
Initialization (basis)
Initialization (basis): it is true prior to the first iteration
Maintenance (step)
Maintenance (step): If it is true before an iteration of the loop, it remains true before the next iteration.
Termination
Termination:When the loop terminates, the invariant gives us a useful property that helps show that the algorithm is correct
Select the loop invariant as _______ as possible to the property you are seeking from your final ____________ of your algorithm.
Select the loop invariant as close as possible to the property you are seeking from your final OUTPUTS of your algorithm.