SHELL SCRIPT TO FIND THE GCD OF TWO NUMBERS.

echo "Enter two numbers"
read a
read b
while [ $a -ne $b ]
do
if [ $a -gt $b ]
then
a =`expr $a - $b`
g =$a
else
b =`expr $b - $a`
g =$b
fi
done
echo "GCD= $g"




Output ->  Enter two numbers
                    4
                    6
                   GCD= 2