only accepting numbers in a prompt

ok, I was wondering if there is any way that when the user enters text in a prompt and hits ok, if the text isn’t a number/numbers a prompt comes up telling them that they are only allowed to type numbers and goes then goes back to the original prompt? help is appreciated

Perhaps something like this, hendo:

to input_number(p, v, i)
	set v to text returned of (display dialog p default answer v with icon i)
		if (count v) > 0 then return v as number
	end try
	input_number("The entry must be a number:", v, 2)
end input_number

input_number("Please enter a number:", "", 1)

Why use an if statement and count command when the coercion can throw an error itself?

		return v as number
	end try