Find prime number with Bash

#!/bin/bash
declare -i start end
declare -a array

start=$1
end=$2

for n in $(seq 1 $end); do
    array[$n]=$n
done

array[1]=0

for j in $(seq 1 $end); do
    if [ ${array[$j]} -eq 0 ]; then
    continue
    fi

    k=$(( $j + $j ))
    while [ $k -le $end ]; do
    array[$k]=0
    k=$(( $k + $j ))
    done
done

for j in $(seq 1 $end); do
    if [ ${array[$j]} -lt $start ] || [ ${array[$j]} -eq 0 ]; then
    continue
    fi
    echo ${array[$j]}
done