[abc123]

well i dont know what redhead is talking about eliminating the void altogether but basically, as everyone has said, void is for functions that don't return anything

void setup()
{
  //load things
  name = "bob";
  age = 10;
}

that doesn't need to return anything, so its void, but...

int getAge()
{
   return age;
}

that implies that something will be returned, hence it is.

void = "i wont return anything";