Simple calculator divide by zero help

[ben822s]

Hello, I'm trying to make a simple calculator with the four basic operations. I want to an LED to turn on when I am dividing by zero. However, if I divide by zero, the LED turns on, and then when I switch to a different operation, the LED remains on until I switch back to "divide" and make the denominator not zero. Can anyone help me with this issue? Thank you. Attached is my VI file.

[RavensFan]

I assume this is a subVI to be used in a larger VI?

Move your divide by 0 indicator OUT of the case structure that way it gets updated no matter which operation is performed.

[ben822s]

No, I'm pretty new to labview and this is a simple first project. The thing is, I only want it to light up when dividing, so if i move it out of the case structure of divide it'll light up every time that my "denominator" is zero, regardless of the operation, correct?

[RavensFan]

No.  Not if you wire a False constant going out to in in every other case.

[altenbach · Accepted solution]

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@RavensFan wrote:

No.  Not if you wire a False constant going out to in in every other case.

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... or only wire it out from the divide case and set the output tunnel to "user default if unwired". It will only light up if the divide operation executes AND the divisor is zero. If will be false (unlit) in all other conditions.

[ben822s]

wow, thank you so much altenbach! this is only my first day using labview and this was extremely helpful! I appreciate it, thanks again!