validate number without using regex

Question

Hi All, 
 Is there any way to validate number without using regex. 
 Here is the requirement, 
 Need to enter only number upto 15-18 character. I can't use here integer or floating-point field so I am using textbox with regexmatch function to validate but my requirement to not use regexmatch function. 
 Is there any way to achieve this ?

Chris · Answer

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
 )
 }
 )
 }
)