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How to give if/else/then control input

Question asked by wangjiajun on Aug 13, 2011
Latest reply on Oct 24, 2011 by sergio

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I am writing some function in VEE to judge if a statement is true or not dynamically. For example, I have a string that says "3>2" or "4<100", and I need to know if that statement of the string is true or not. I tried the build-in IF/Else/Then flow but failed to find any control input. How can I evaluate the string to see if it is true or not?

Thanks!

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boespflu Aug 25, 2011 10:04 AM
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I am not quite clear on what you are trying to do, but I will take a guess; You want to visually know if data meets any of the criteria set in your if/then/else statement? If yes, just wire the true statement (“Then”) output to an indicator or text-to-display and the false (Else) pin to a different indicator or text. I did a quick example to highlight this; just change the real64 value to watch the indicator tell you if it is true or false.

One thing that could make it more complicated is the data type; you were calling it “Strings” but using numbers as examples. If it is truly numbers (3<2 or 4<100), then it is easy, and that is what I used in my example, but if it is strings (“Jane”<”Two”) then it would be more complicated.
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- IF_Indicator.vee3.2 KB
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wikily Sep 4, 2011 11:08 AM
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If it's as simple as 4<10 maybe you want this...??

Load a text input box, then a standard + formula box.

Delete the terminals from the formula box, and the formula.

Add a control terminal to the formula box ( only one allowed is formula )

wire text output, and VERY IMPORTANT..... wire Text out flow to formula in flow.

Send result to alpha numeric ,and you should see true, or false, depending on the evaluation in the text box.
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sergio Oct 24, 2011 12:42 PM
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attached the screenshot how it looks like in VEE
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- text_formula_eval.png6.1 KB
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How to give if/else/then control input

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