Why are two doubles not compared?

Question

C++ / C#

double x, y;
  printf("Input x and y: "); scanf_s("%lf", &x); scanf_s("%lf", &y);
  if (y > 1)
  {
    printf("Vasha tochka prinadleshit oblasti: x(-infinity;+infinity), y[1;+infinity)\n");
  }
  else if (y >= -3.0 && y <= -4.0)
  {
    printf("Vasha tochka prinadleshit oblasti: x(-infinity;+infinity), y[-3;-4]\n");
  }

Such is the code. The second condition does not work, even though you hit the wall. Please tell me what is the problem?

Answer 1

Because the condition must be like this
if you want to get a match from -3 to -4