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Keeping Leading Zeros from Forms

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Posted on by dedgerton1

I have a form that asks for an ID number that should contain two leading zeros. How do I ensure that the leading zeros remain when building my flow? I would like to verify that the user submitted exactly a nine-digit number and that they keep the leading zeros if they input them that way. I do not wish to exclude numbers that don't have leading zeros.

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Ellis Karim 11,691 Super User 2025 Season 2 on at

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Hi @dedgerton1

One option could be to treat the ID as a string.

You could then check if the ID starts with '00', that the length of the ID is 9 and that it is an integer using expressions and the Condition action:

isInt('001234567')

length('001234567')

startsWith('001234567', '00')

Ellis
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dedgerton1 83 on at

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Would it be 3 separate "equals" rows under one condition? And do I replace your instance of 001234567 with Compose Output? These IDs could also start with "900," so how do I ensure that I'm not excluding those?

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Ellis Karim 11,691 Super User 2025 Season 2 on at

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The following example should help:

Your condition would be similar to the following:

I'm using the string function for 00 and 900 so that flow doesn't flag error that I'm trying to compare a string to an integer value.

Ellis
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