Location radius

Hello everybody, I need help with location radius script.

Here is my location radius code:

Code:

              int x = -16;
              int y = 72;
              int z = 270;
              int radius = 5;
              double distance = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2));
              if (distance <= radius)
                  System.out.println("PLAYER SPAWNED IN SAFE LOCATION");
              else
                  System.out.println("PLAYER SPAWNED IN UNSAFE LOCATION");

I don' know why but it's always false...
Server says that i spawned in unsafe location but really i'm in safe location...

Can you help me?

 

location.distance(location) <= limit

 

Thank you for reply but i don't understand about what limit you say...

 

You are not calculation any distance. Where is you second point?

Code:

Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2) + Math.pow(z, 2));

 

I need to increase this coordinates radius:
int x = -16; int y = 72; int z = 270;
Now i should stay at -16 72 270 but i want to make -16 to -11 72 to 77 and 270 to 275
+5 radius how to make it?