Distance(A, B) tells you how far apart two points are.
Objective : vector3 = vector3{X := 0.0, Y := 0.0, Z := 0.0}
Players := GetPlayspace().GetPlayers()
for (P : Players, C := P.GetFortCharacter[]):
Here := C.GetViewLocation()
if (Distance(Here, Objective) < 500.0):
Print("Player reached the objective!")
Takeaway — Distance = one number for 'how far apart'.