¿Qué sucede si una variable o método se hace privado?

What happens if a variable or method is made private?

If we make any class constructor private, we cannot create the instance of that class from outside the class. According to the previous point, if we assign a private modifier to any method or variable, that method or variable can be overridden to sub-class using all type of access modifiers.

“Private” variable means “controlled” access not “no” access. e.g. I can make the variable read-only by having only a getter method and no setter method. The owning class decides the access to to be provided to the variable – via methods it exposes to the public.

Like their public equivalent, private static methods are called on the class itself, not instances of the class. Like private static fields, they are only accessible from inside the class declaration.

Class variables that are declared as private can not be referred to from other classes, they are only visible within their own class. It is considered better programming practice to use private rather than public class variables, and you should aim to do this in the remainder of the course.

It’s usually a matter of scope. If you use an ng-repeat which creates child scopes for each iteration, you would want to pass the instance variable as a parameter. Otherwise you wouldn’t know what it is. Other than that, I would say it’s just a matter of preference and ease of writing. – Zack Argyle Sep 23 ’13 at 19:27

The part of the program where a particular variable is accessible is termed as the Scope of that variable. A variable can be defined in a class, method, loop etc. In C/C++, all identifiers are lexically (or statically) scoped, i.e.scope of a variable can be determined at compile time and independent of the function call stack.

– Stack Overflow How can we pass variables from one method to another in the same class without taking the help of parent class?

We can declare class variables anywhere in class, but outside methods. Access specified of member variables doesn’t effect scope of them within a class. Variables declared inside a method have method level scope and can’t be accessed outside the method. Note : Local variables don’t exist after method’s execution is over.