Are there built-in math functions that can be used in variable calculations (in basic logic flows, not Homeyscript)? If so, where can I find the docs?

Try this list: https://mathjs.org/docs/reference/functions.html Example: {{round(5.345,2)}}

Sorry my mistake, thanks Peter, changing a negative outcome to a positive outcome = multiply by -1 (IMHO) I need to create a variable with a positive outcome or, if the outcome is negative; zero (0) any suggestions on this?

{{max(0, [YourVar])}} returns a zero when [YourVar] is a negative number, see screenshot in my edited reply above. [image] HanZ: changing a negative outcome to a positive outcome = multiply by -1 (IMHO) You’re right. I tried this {{[MyNumVar] * -1}} but that didn’t work. This works: {{ro…

Oh wow, thank you @Peter_Kawa @HanZ maybe uoy can do something like {{ (value >= reference) true_value : false_value }} So that would become something like: {{ (value >= 0) value : 0 }} But you could also just return the highest value of two arguments using max() {{ max(value, 0) }} I have…

In BetterLogicLibrary you can use way more advanced calculations. Just FYI.

Just over the moon I understand (a bit of) the variable things Arie. A topic with a lot of examples and explanations could help (I hoop)

Use the “Calculate…” card, not the “Set…” card.

Hi all.. A problem I thought would be simple - But nooooo. I’m doing logic drills to inteligently calculate a variable, that I’d use for adjusting a pool-heatpump for tomorrow energy prices. The issue is, that “tomorrow vaulues” are not available until around noon today - so the logic can’t calcu…

Many Math.js functions will work.

Add a ‘crazy’ number to the calculation, check no and subtract afterwards. I did with temperature : VAR + 1000 If VAR greater than 1000 its a number (if its 1000 or less its not) VAR - 1000 If VAR eq 24 Edit: Does NOT work if VAR is a character like ‘T’..

Available math functions

Questions & Help

Patrick_Spadrille March 11, 2025, 7:19am 37

I try to do some math inside the card to set a variable to a number. In the number field, i entered {{10+20}} but when i press ENTER, it just delete what i have put in the field. What am i doing wrong?

Can't add math inside fields

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Available math functions

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