How to find prime numbers between 0 - 100?

Answer 1

Here's how I solved it. Rewrote it from Java to JavaScript, so excuse me if there's a syntax error.

function isPrime (n)
{
    if (n < 2) return false;

    /**
     * An integer is prime if it is not divisible by any prime less than or equal to its square root
     **/

    var q = Math.floor(Math.sqrt(n));

    for (var i = 2; i <= q; i++)
    {
        if (n % i == 0)
        {
            return false;
        }
    }

    return true;
}

A number, n, is a prime if it isn't divisible by any other number other than by 1 and itself. Also, it's sufficient to check the numbers [2, sqrt(n)].