Shell program to display all the prime numbers between 1 to 100 using while loop

 Shell program to display all the prime numbers between 1 to 100 using while loop

#!/bin/bash

echo "Enter a limit"

read limit

echo "prime numbers upto $limit are :"

echo "1"

i=2

while [ $i -le $limit ]

do

    flag=1

    j=2

    while [ $j -lt $i ]

    do

         rem=$(( $i % $j ))

        if [ $rem -eq 0 ]

        then

          flag=0

          break

        fi

    j=$(( $j+1 ))

    done

    if [ $flag -eq 1 ]

    then

       echo "$i"

    fi

i=$(( $i+1 ))

done