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BMI should be of char type

Need help with my BMI application

Hi!

I am trying to get the BMI but I don´t know what is wrong. I got this error message:

Of course the answer should be of type “char” but I couldn´t find a way to choose that. And I am pretty sure that I took “number” when I did the choce “thing”…

Text G: API Connector error: {“result”:null,“error”:“Error: Value expected (char 3)”}

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