DAY 9.11

#!/bin/bash
function add()
{
   arr1=($1)	
   sum=0
   for i in ${arr1[*]}
   do
	   ((sum+=$i))
   done
}

function out()
{
   echo `id -u`
   echo `id -g`
}

arr=(11 22 33 44)
add "${arr[*]}"
echo $sum

res=`out`
echo $res