Square Root

public static float getSquareRoot(int a)
{
    float x = Float.valueOf(a);
    float y = x / Float.valueOf(2);

    while (true)
    {
        float temp = (x / y + y) / Float.valueOf(2);
        if (y == temp) return Math.round(y * Float.valueOf(100)) / Float.valueOf(100);
        y = temp;
    }
}