For loop iteration control #3

Re: For loop iteration control #3

What is the value in Numeric Value Out after the following has executed?

a) 0

b) 5

c) 9

d) 12

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Answer: D

For loop iteration count can be controlled by; the value wired to the Count (N) terminal, the size of an input array (with auto-indexing enabled) or optionally by a Conditional terminal. If multiple specifications of iteration count are made (as in the question) the loop will always opt for the fewest number of iterations. In the question the loop will iterate 4 times defined by the size of the smaller of the two auto-indexed arrays.

At run time:

On the fourth (and final) iteration of the loop the values auto-indexed from the arrays are 4 & 8; these are added together and passed to the output tunnel. Having completed four iterations the For loop completes and the value in the output tunnel is passed to Numeric Value Out.