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216 lines
8.2 KiB
ReStructuredText
216 lines
8.2 KiB
ReStructuredText
:github_url: hide
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.. _class_bool:
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bool
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====
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Un tipo booleano incorporado.
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.. rst-class:: classref-introduction-group
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Descripción
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----------------------
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The **bool** is a built-in :ref:`Variant<class_Variant>` type that may only store one of two values: ``true`` or ``false``. You can imagine it as a switch that can be either turned on or off, or as a binary digit that can either be 1 or 0.
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Booleans can be directly used in ``if``, and other conditional statements:
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.. tabs::
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.. code-tab:: gdscript
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var can_shoot = true
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if can_shoot:
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launch_bullet()
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.. code-tab:: csharp
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bool canShoot = true;
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if (canShoot)
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{
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LaunchBullet();
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}
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All comparison operators return booleans (``==``, ``>``, ``<=``, etc.). As such, it is not necessary to compare booleans themselves. You do not need to add ``== true`` or ``== false``.
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Booleans can be combined with the logical operators ``and``, ``or``, ``not`` to create complex conditions:
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.. tabs::
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.. code-tab:: gdscript
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if bullets > 0 and not is_reloading():
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launch_bullet()
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if bullets == 0 or is_reloading():
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play_clack_sound()
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.. code-tab:: csharp
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if (bullets > 0 && !IsReloading())
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{
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LaunchBullet();
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}
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if (bullets == 0 || IsReloading())
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{
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PlayClackSound();
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}
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\ **Note:** In modern programming languages, logical operators are evaluated in order. All remaining conditions are skipped if their result would have no effect on the final value. This concept is known as `short-circuit evaluation <https://en.wikipedia.org/wiki/Short-circuit_evaluation>`__ and can be useful to avoid evaluating expensive conditions in some performance-critical cases.
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\ **Note:** By convention, built-in methods and properties that return booleans are usually defined as yes-no questions, single adjectives, or similar (:ref:`String.is_empty()<class_String_method_is_empty>`, :ref:`Node.can_process()<class_Node_method_can_process>`, :ref:`Camera2D.enabled<class_Camera2D_property_enabled>`, etc.).
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.. rst-class:: classref-reftable-group
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Constructores
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--------------------------
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.. table::
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:widths: auto
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+-------------------------+----------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`bool<class_bool_constructor_bool>`\ (\ ) |
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+-------------------------+----------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`bool<class_bool_constructor_bool>`\ (\ from\: :ref:`bool<class_bool>`\ ) |
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+-------------------------+----------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`bool<class_bool_constructor_bool>`\ (\ from\: :ref:`float<class_float>`\ ) |
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+-------------------------+----------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`bool<class_bool_constructor_bool>`\ (\ from\: :ref:`int<class_int>`\ ) |
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+-------------------------+----------------------------------------------------------------------------------+
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.. rst-class:: classref-reftable-group
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Operadores
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--------------------
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.. table::
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:widths: auto
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+-------------------------+-----------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator !=<class_bool_operator_neq_bool>`\ (\ right\: :ref:`bool<class_bool>`\ ) |
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+-------------------------+-----------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator \<<class_bool_operator_lt_bool>`\ (\ right\: :ref:`bool<class_bool>`\ ) |
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+-------------------------+-----------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator ==<class_bool_operator_eq_bool>`\ (\ right\: :ref:`bool<class_bool>`\ ) |
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+-------------------------+-----------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator ><class_bool_operator_gt_bool>`\ (\ right\: :ref:`bool<class_bool>`\ ) |
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+-------------------------+-----------------------------------------------------------------------------------------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Descripciones de Constructores
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------------------------------------------------------------
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.. _class_bool_constructor_bool:
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.. rst-class:: classref-constructor
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:ref:`bool<class_bool>` **bool**\ (\ ) :ref:`🔗<class_bool_constructor_bool>`
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Construye un **bool** establecido en ``false``.
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.. rst-class:: classref-item-separator
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----
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.. rst-class:: classref-constructor
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:ref:`bool<class_bool>` **bool**\ (\ from\: :ref:`bool<class_bool>`\ )
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Construye un **bool** como una copia del **bool** dado.
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.. rst-class:: classref-item-separator
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----
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.. rst-class:: classref-constructor
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:ref:`bool<class_bool>` **bool**\ (\ from\: :ref:`float<class_float>`\ )
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Convierte un valor :ref:`float<class_float>` a un valor booleano. Devuelve ``false`` si ``from`` es igual a ``0.0`` (incluyendo ``-0.0``), y ``true`` para todos los demás valores (incluyendo :ref:`@GDScript.INF<class_@GDScript_constant_INF>` y :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>`).
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.. rst-class:: classref-item-separator
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----
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.. rst-class:: classref-constructor
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:ref:`bool<class_bool>` **bool**\ (\ from\: :ref:`int<class_int>`\ )
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Convierte un valor :ref:`int<class_int>` a un valor booleano. Devuelve ``false`` si ``from`` es igual a ``0``, y ``true`` para todos los demás valores.
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Descripciones de Operadores
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------------------------------------------------------
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.. _class_bool_operator_neq_bool:
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.. rst-class:: classref-operator
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:ref:`bool<class_bool>` **operator !=**\ (\ right\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_bool_operator_neq_bool>`
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Devuelve ``true`` si los dos booleanos no son iguales. Es decir, uno es ``true`` y el otro es ``false``. Esta operación puede verse como un XOR lógico.
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.. rst-class:: classref-item-separator
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----
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.. _class_bool_operator_lt_bool:
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.. rst-class:: classref-operator
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:ref:`bool<class_bool>` **operator <**\ (\ right\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_bool_operator_lt_bool>`
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Devuelve ``true`` si el operando izquierdo es ``false`` y el operando derecho es ``true``.
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.. rst-class:: classref-item-separator
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----
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.. _class_bool_operator_eq_bool:
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.. rst-class:: classref-operator
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:ref:`bool<class_bool>` **operator ==**\ (\ right\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_bool_operator_eq_bool>`
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Devuelve ``true`` si los dos booleanos son iguales. Es decir, ambos son ``true`` o ambos son ``false``. Esta operación puede verse como un EQ o XNOR lógico.
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.. rst-class:: classref-item-separator
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----
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.. _class_bool_operator_gt_bool:
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.. rst-class:: classref-operator
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:ref:`bool<class_bool>` **operator >**\ (\ right\: :ref:`bool<class_bool>`\ ) :ref:`🔗<class_bool_operator_gt_bool>`
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Devuelve ``true`` si el operando izquierdo es ``true`` y el operando derecho es ``false``.
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.. |virtual| replace:: :abbr:`virtual (Normalmente, este método debería ser sobreescrito por el usuario para que tenga algún efecto.)`
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.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
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.. |const| replace:: :abbr:`const (Este método no tiene efectos secundarios. No modifica ninguna de las variables miembro de la instancia.)`
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.. |vararg| replace:: :abbr:`vararg (Este método permite agregar cualquier número de argumentos después de los descritos aquí.)`
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.. |constructor| replace:: :abbr:`constructor (Este método se utiliza para construir un tipo.)`
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.. |static| replace:: :abbr:`static (Este método no necesita una instancia para ser llamado, por lo que puede llamarse directamente utilizando el nombre de la clase.)`
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.. |operator| replace:: :abbr:`operator (Este método describe un operador válido para usar con este tipo como operando izquierdo.)`
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.. |bitfield| replace:: :abbr:`BitField (Este valor es un entero compuesto como una máscara de bits de las siguientes banderas.)`
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.. |void| replace:: :abbr:`void (Sin valor de retorno.)`
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