question mark in "setPixel" documentation example?

what's the question mark in the code

function Start () { // Create a new texture and assign it to the renderer's material var texture = new Texture2D(128, 128); renderer.material.mainTexture = texture;

   // Fill the texture with Sierpinski's fractal pattern!
  for (var y : int = 0; y < texture.height; ++y) {
       for (var x : int = 0; x < texture.width; ++x) {
           var color = (x&y) ? Color.white : Color.gray;
            texture.SetPixel (x, y, color);
       }
  }
  // Apply all SetPixel calls
  texture.Apply();

from unity's documentation on SetPixel? and the colon, in here. does it check (?) if the color on a given place i white, an if it is it switches it(:) with gray? and if so, where could we see more examples of such coding?