Write a shell script to check whether a given number is prime or not.

Write a shell script to check whether a given number is prime or not.

echo "Enter a number: "
read num
i=2
f=0
while [ $i -le `expr $num / 2` ]
do
if [ `expr $num % $i` -eq 0 ]
then
f=1
fi
i=`expr $i + 1`
done
if [ $f -eq 1 ]
then
echo "The number is composite"
else
echo "The number is Prime"
fi

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                OUTPUT
Enter a number:
5
The number is Prime