Question

I am generating selectlist option for setting stroke-opacity , like:

<label for="so">
    Stroke-opacity :</label>
<select id="so">
    @for (double i = 1; i >= 0; i-=0.1)
    {
        <option value="@i">@i</option>
    }
</select>

My problem is that, the last option (which should have value 0) have some unexpected value which is: 1.38777878078145E-16. Can please anybody tell me whats going on here?

Answer 1

Try using a type of decimal instead of double. Since double is a floating-point number, it can lose precision.

<label for="so">
    Stroke-opacity :</label>
<select id="so">
    @for (decimal i = 1M; i >= 0M; i-=0.1M)
    {
        <option value="@i">@i</option>
    }
</select>