Shell Scripts to check for Prime numbers

Write a Shell Script to check whether a given number is Prime or not

Solution:

echo Enter any number

read num

b=`expr $num / 2`

if test $b -eq 1

then

echo It is a Prime number

fi

n=2

x=0

while [ $b -ge $n ]

do

c=`expr $num % $n`

if test $c -eq 0

then

echo Number is not prime

x=0

break

else

x=1

fi

n=`expr $n + 1`

done

if test $x -eq 1

then

echo It is a Prime number

fi

Solution: