validate number without using regex

Hi,

You can use stripwith.

This will return true if all entered inputs are numbers.

isnull(
stripwith(lower(ri!textinput), "1234567890")
)

furthermore you can use len() , and() to check the length.

There are a few ways to achieve this.  Here's a working example utilizing cleanwith() to automatically remove alpha characters, and validates length of up to 18.

a!localVariables(
  local!data,
  {
    a!textField(
      label: "Enter Data",
      value: local!data,
      saveInto: a!save(local!data,cleanwith(save!value,"1234567890")),
      validations: {
        if(
          len(local!data)>18,
          "Please enter a number up to 18 characters",
          null
        )
      }
    )
  }
)