#!/bin/bash

# This script uses if / elif / else flow structure to compare
# three numbers, and indicate if 1 & 2 & 3 match, 1&2 match
# 2&3 match, or no match

echo -n "Enter first number:"
read num1
echo -n "Enter second number:"
read num2
echo -n "Enter third number:"
read num3

# -a represents the expression "and" 

if [ "$num1" = "$num2" -a "$num2" = "$num3" ]
	then
		echo "All numbers match"
	elif [ "$num1" = "$num2" ]
		then
			echo "First & Second numbers match"
	elif [ "$num2" = "$num3" ]
		then
			echo "Second & Third numbers match"
	else
		echo "None of the numbers match"
fi