Why does the DirectX 11 "Hello quad" sample have a z-coordinate of 0.5?

[rbwhitaker]

I was going through the code for the "Hello Quad" sample for DX 11, and was confused about this bit of code:

float[] vertices =
{
    //  X      Y      Z
     0.5f,  0.5f,  0.0f,
     0.5f, -0.5f,  0.0f,
    -0.5f, -0.5f,  0.0f,
    -0.5f,  0.5f,  0.5f, // Why 0.5f for Z?
};

I added the comment at the end there, but it's the question I have. Why is the final z-coordinate 0.5f instead of 0.0f?

[aquagoose]

This will just be a mistake that no one noticed since it doesn't affect the final output. I can't imagine that was done on purpose!