This function:
def posts(request):
    # Get start and end points
    start = int(request.GET.get("start") or 0)
    end = int(request.GET.get("end") or (start + 9))
    # Generate list of posts
    data = []
    for i in range(start, end + 1):
        data.append(f"Post #{i}")
    # Artificially delay speed of response
    time.sleep(1)
    # Return list of posts
    return JsonResponse({
        "posts": data
    })
in view.py, what is or in these two lines?
start = int(request.GET.get("start") or 0)
end = int(request.GET.get("end") or (start + 9))
