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212 lines
6.8 KiB
ReStructuredText
212 lines
6.8 KiB
ReStructuredText
:github_url: hide
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.. DO NOT EDIT THIS FILE!!!
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.. Generated automatically from Godot engine sources.
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.. Generator: https://github.com/godotengine/godot/tree/master/doc/tools/make_rst.py.
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.. XML source: https://github.com/godotengine/godot/tree/master/doc/classes/bool.xml.
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.. _class_bool:
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bool
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====
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A built-in boolean type.
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.. rst-class:: classref-introduction-group
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Description
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-----------
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A **bool** is always one of two values: ``true`` or ``false``, similar to a switch that is either on or off. Booleans are used in programming for logic in condition statements.
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Booleans can be directly used in ``if`` and ``elif`` statements. You don't need to add ``== true`` or ``== false``:
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.. tabs::
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.. code-tab:: gdscript
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if can_shoot:
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launch_bullet()
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.. code-tab:: csharp
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if (canShoot)
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{
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launchBullet();
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}
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Many common methods and operations return **bool**\ s, for example, ``shooting_cooldown <= 0.0`` may evaluate to ``true`` or ``false`` depending on the number's value.
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\ **bool**\ s are usually used with the logical operators ``and``, ``or``, and ``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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.. rst-class:: classref-reftable-group
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Constructors
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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>` **(** :ref:`bool<class_bool>` from **)** |
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+-------------------------+-------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`bool<class_bool_constructor_bool>` **(** :ref:`float<class_float>` from **)** |
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+-------------------------+-------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`bool<class_bool_constructor_bool>` **(** :ref:`int<class_int>` from **)** |
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+-------------------------+-------------------------------------------------------------------------------------+
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.. rst-class:: classref-reftable-group
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Operators
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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>` **(** :ref:`bool<class_bool>` right **)** |
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+-------------------------+--------------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator \<<class_bool_operator_lt_bool>` **(** :ref:`bool<class_bool>` right **)** |
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+-------------------------+--------------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator ==<class_bool_operator_eq_bool>` **(** :ref:`bool<class_bool>` right **)** |
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+-------------------------+--------------------------------------------------------------------------------------------+
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| :ref:`bool<class_bool>` | :ref:`operator ><class_bool_operator_gt_bool>` **(** :ref:`bool<class_bool>` right **)** |
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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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Constructor Descriptions
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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** **(** **)**
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Constructs a default-initialized **bool** set to ``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** **(** :ref:`bool<class_bool>` from **)**
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Constructs a **bool** as a copy of the given **bool**.
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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** **(** :ref:`float<class_float>` from **)**
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Cast a :ref:`float<class_float>` value to a boolean value. This method will return ``false`` if ``0.0`` is passed in, and ``true`` for all other values.
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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** **(** :ref:`int<class_int>` from **)**
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Cast an :ref:`int<class_int>` value to a boolean value. This method will return ``false`` if ``0`` is passed in, and ``true`` for all other values.
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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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Operator Descriptions
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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 !=** **(** :ref:`bool<class_bool>` right **)**
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Returns ``true`` if two bools are different, i.e. one is ``true`` and the other is ``false``.
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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 <** **(** :ref:`bool<class_bool>` right **)**
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Returns ``true`` if the left operand is ``false`` and the right operand is ``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 ==** **(** :ref:`bool<class_bool>` right **)**
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Returns ``true`` if two bools are equal, i.e. both are ``true`` or both are ``false``.
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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 >** **(** :ref:`bool<class_bool>` right **)**
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Returns ``true`` if the left operand is ``true`` and the right operand is ``false``.
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.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
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.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
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.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
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.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
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.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
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.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`
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