#!/bin/bash

isint() { 
	declare -i ARG;
	ARG=$1;
	if [ $ARG -ge 0 ]; then
		return 0;
	else
		return 1;
	fi; 
}


if [ $# -gt 2 ]; then
	echo "Usage: ${0} [arg1] [arg2]" >&2 ;
else 
	# 2 arguments or less.
	true
fi