'How to deal with double quotes in conditional formatting's formula

I was having a look at this question, and in order to help, I wrote a conditional formatting rule, based on this formula:

="ABS(B3-A3)>=1,5" // the double-quotes are automatically added by Excel

This, however, seems not to work, although the formula seems to be correct (in the cell at the right, I asked whether this was true and I got a positive result, as you can see (WAAR is Dutch for true)):

Excel screenshot

I'm not interested in the final solution, I just want to know how I can debug such a situation: apparantly the formula is true, but still the conditional formatting is not applied. This might mean that:

  • Something is wrong with the language settings.
  • Something is wrong with the dot/comma decimal separator.
  • Something else is wrong with the formula (absolute references, relative references, ...)

How can I, step by step, evaluate the formula, entered in a conditional formatting configuration, in order to see what might be wrong?

Thanks in advance



Solution 1:[1]

  1. Select the whole range (for the example A2:B5)
  2. Add in conditional formatting formula =ABS($B3-$A3)>=1.5

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Result:

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Solution 2:[2]

Remove the "" at the beginning and end of your formula. Should do the trick.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Error 1004
Solution 2