How to add leading zero?

Hi all,
Spoiler alert - “dumb” question ahead!

How can we add leading zeros to a string?
Give or take something like padStart


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Not a dumb question; so many people face this issue.

I solved it for one client recently (a different use case but include your solution.)

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Pretty simple, add ’ at 0 value and use replace function to pass it as string.

This is a very common problem with zip codes or telephon numbers.
I’d like to add my go-to solution:

  1. convert the input string to a number format
    “4567” → 4567

  2. Add 10… to the number
    4567 + 10 000 000 = 10 004 567

  3. convert the number back to a string
    10 004 567 → “10004567”

  4. remove the first character of the new string
    “10004567” → “0004567”

This would be the make formula for a output string with 7 characters,
{{substring(toString(parseNumber( INPUTDATA ; ) + 10000000); 1; 8)}}
you can just copy and paste this into make :slight_smile:

you can modify this however you like, for example this is the formula for 10 characters
{{substring(toString(parseNumber( INPUTDATA ; ) + 10000000000); 1; 11)}}

it’s best to filter your input data to avoid errors. You can do this with a MatchPattern filter. for example:

This pattern will only allow strings which contain numbers between 0 and 9 and have a minimum of 1 character and a maximum of 7 characters.

This pattern will only allow strings which contain the numbers 2, 4, 6 or 8 and have a minimum of 3 characters and a maximum of 11 characters.