I made the following Google script to check whether a string is less than some length:

function isLengthLessThan(length, text) {
  return (text.length < length)

How can I set up data validation using this custom formula to check the length of cells? What can I put where the question mark is so that it will represent the value of the cell?

custom formula data validation screen


Please try:


applied to a range starting with A1.

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