clear
echo Enter the number m
read m
echo Enter the number n
read n
echo Prime numbers are as follow :
while [ $m -lt $n ]
do
  i=2
  flag=0
  while [ $i -le `expr $m / 2` ]
  do
    if [ `expr $m % $i` -eq 0 ]
      then
      flag=1
      break
    fi
    i=`expr $i + 1`
  done
  if [ $flag -eq 0 ]
  then
    echo $m is a prime number
  fi
  m=`expr $m + 1`
done