Shell Scripting : 01 - Checking 2 String's If it's Empty or Equal

This is a Shell Script used to determine two Strings, if they are Empty or Equal.

Program Code:

#!/bin/bash

echo " Enter String Number 1"
read STR1
echo " Enter String Number 2"
read STR2

if [ -z $STR1 ]; then
 echo " The String1 is Empty"
else
 echo " The String1 is not Empty"
fi 

if [ -n $STR2 ]; then
 echo " The String2 is not Empty"
else
 echo " The String2 is Empty"
fi 

if [ $STR1 = $STR2 ]; then
 echo " Both Strings is equal" 
else
 echo " Both String are not equal"
fi

Porgram Output: