PHP - check if number is prime

Question

I\'m trying to create a function which checks whether the number is prime or not. BUT I want this function to echo to the user \'prime\' or \'NOT prime\' - and that\'s where my

Answer 1

I made a similar one where a user types in a number and PHP checks if the number is prime or not.

HTML

See if your number is a prime number

PHP

if ($_GET) {

    $i = 2;

    $isPrime = true;

    while ($i < $_GET['number']) {

        if ($_GET['number'] % $i == 0){

            // Number is NOT prime
            $isPrime = false;

        }

        $i++;
    }

    if ($isPrime){

        echo '
'.$i.' is a prime number!';

    } else {

        echo '
'.$i.' is NOT a prime number';

    }

}

Hopefully this works for you.