Encapsulation

The purpose of encupsulation is to make sure that sensitive data is hidden from users. To achieve this, you must add underscore(_) in front of your variables or attributes names.

Example:

struct Person{
  string name;
  string _id;
  string _address.

  init Person(name, _id, _address);

  # ...
}

int main(string args[]){

  Person p = Person("Dara", "e20250972", "ax34ld");

  print("Name: {}\n", p.name);
  print("ID: {}\n", p._id); # error!
  print("Address: {}\n", p._address); # error!
  return 0;
}

The above program would not get compiled because we try to access the data that we're supposed not to touch.

Other Cases

The use of underscore to make something hidden does not only works for struct, it also works outside of struct, such as make a function local or global across many source files.

void _hidden_function(){
  # code...
}

You are not able to use the _hidden_function outside this test.kh source file because it's marked as local.