double array yields only zeroes

static void RunExerciseSixteen()
        {
            int[] ints = new int[10];
            Random rnd = new Random();
            double[] dbls = new double[ints.Length];

            for (int i = 0; i < ints.Length; i++)
            {
                ints[i] = rnd.Next(1, 500);
            }

            for (int i = 0; i < dbls.Length; i++)
            {
                Convert.ToDouble(dbls[i] = 1 / ints[i]);
            }

            foreach (int i in ints)
            {
                Console.WriteLine("Intsarray: " + i);
            }
            foreach (double i in dbls)
            {
                Console.WriteLine("Dblsarray: " + i); // Yields '0' repeatedly, why?
            }
        }

What am I getting wrong here?

integer math

Dividing two integers truncates the fractional part

Cast the integers to double

Doesn't "Convert.ToDouble()" do that?

That parses a double from a string

casting is very different

Um...then it wouldn't compile

Oh, good point

I don't use that Convert class too often. I suppose it's an overload then

But the convert is on the result of the integer division where truncation has already happened

I haven't been taught casting yet. But from what I've read online it's putting the desired type in parenthesis before the variable I want casted, correct? Is there anything else I ought to know about casting?

You need to do floating point division

Like 1 / (double)ints[i]

Ok, so what I've gathered from this is that the Convert class only deals in converting string to ints/doubles etc while (casting) converts types into other types?

No

But you don't need to use Convert here

You need to convert int to double before you do the division, not after

You could use Convert to do that technically but casting is more straightforward

The casting works fine. I don't understand why however. Seems like I was doing the same thing with the Convert class. I'll be googling on the differences in a second.

It seems to be a quite complex topic, one I won't be able to wrap my head around in this short moment. But I'd like to thank you for your help.

Convert takes as input the result of the division (in your example) AFTER the integer division happened and already threw away the decimal part

When you divide two integers the result is an integer, and integers have no way to represent fractions