Help with WHILE loops

Question

Help with WHILE loops

mappryan (Structural)

(OP)

18 Aug 11 09:42

I am very inexperienced with while loops. I am trying to write a loop that checks all the answers in a vector and if they are "OK" then it outputs "OK". I keep getting an "array index invalid for this array problem". I have written a simplified example of this problem to post here. If someone could please take a look and explain what I am doing wrong it would be greatly appreciated. I believe it is due to my lack of knowledge/experience with using a while loop altogether. Thank you

zdas04 (Mechanical) · Answer 1 · 2011-08-18 10:06:10

I don't see where you assign any value to "vec". If I make start and end different from each other the error goes away and vec_location has a value in the output (the value is the next cell after the end of the while).

David

mappryan (Structural) · Answer 2 · 2011-08-18 10:26:25

well vec is not defined because I am using it as a function and therefore it isnt required to be defined. The origin has something to do with this problem as if i set the origin to zero in worksheet preferences both work. I think I have some sort of misunderstanding of the array indexing that I was hoping someone could clarify

IRstuff (Aerospace) · Answer 3 · 2011-08-18 10:39:47

No, it's due to the fact that your x cannot terminate your WHILE, resulting in the index going above 10. In fact, no vector with a 0 in the last location will terminate the WHILE.

TTFN

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mappryan (Structural) · Answer 4 · 2011-08-18 11:17:32

IRstuff thank you. I realize what is wrong now. To fix it I am guessing there needs to be an otherwise statement added to the IF statement but I can't seem to get that to work. Any ideas of what i can do

IRstuff (Aerospace) · Answer 5 · 2011-08-18 12:16:06

Either that, or you put the index increment at the start and start with zero. Or, you figure out at the start what the maximum allowable index can be.

TTFN

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Help with WHILE loops