hwo to make ana array of prime numbers in javascript
function sort_prime(num) {
var prime_num1 = [],
prime_num2 = [];
for (var i = 0; i <= num; i++) {
prime_num2.push(true);
}
for (var i = 2; i <= num; i++) {
if (prime_num2[i]) {
prime_num1.push(i);
for (var j = 1; i * j <= num; j++) {
prime_num2[i * j] = false;
}
}
}
return prime_num1;
}
console.log(sort_prime(5))