Mine

round () {
if [ "${1#*.}" = "$1" ]
then 
  return $1
else
  if [[ "${1#*.}" < "49" ]]
  then 
    return ${1%.*}
  else
    returner=${1%.*}
    let "returner += 1"
    return $returner
  fi
fi
unset $returner
}
round $1
echo $?