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Testing for numeric

Kericomp
in Calculation Engine (Define Fields)

Featured Replies

  • Newbies

I have been using ABS(field) to test if field is numeric or text. This works for all text except words that start with the letter T. The abs() of "T" returns a value of 1. For any other letter it is blank. Why is this so??? Is it a special feature in Filemaker 4.1?

It's interpreting the T as the boolean value "true" which is stored internally as the value 1.

Try using this test:

NumToText(TextToNum(field))=field

  • Author
  • Newbies

AHA! that explains why the letter "F" returns a zero and not a blank. thanks

Use the TextToNum() function. It'll strip out all text and just leave the numbers nicely.

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https://fmforums.com/topic/12390-testing-for-numeric/
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