Tests if two strings are an anagram. Run it with `./anagramTest.sh string1 string2`

anagramTest.sh

#!/bin/bash
string1=$1
string2=$2
count=0

if [[ -e "$string2" || ( ${#string1} -ne ${#string2} ) ]]
then
	echo "Not an anagram."
else
	for (( i=0; i<${#string1}; i++ ))
	do
		if [[ "$string2" =~ ${string1:$i:1} ]]
		then
			((count++))
		fi
	done
	if [ $count -eq ${#string1} ]
	then
		echo "Anagram!"
	else
		echo "Not an anagram."
	fi
fi

I don't understand anything :D