godot/doc/classes/bool.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="bool" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
	<brief_description>
		A built-in boolean type.
	</brief_description>
	<description>
		A [bool] is always one of two values: [code]true[/code] or [code]false[/code], similar to a switch that is either on or off. Booleans are used in programming for logic in condition statements.
		Booleans can be directly used in [code]if[/code] and [code]elif[/code] statements. You don't need to add [code]== true[/code] or [code]== false[/code]:
		[codeblocks]
		[gdscript]
		if can_shoot:
		    launch_bullet()
		[/gdscript]
		[csharp]
		if (canShoot)
		{
		    launchBullet();
		}
		[/csharp]
		[/codeblocks]
		Many common methods and operations return [bool]s, for example, [code]shooting_cooldown &lt;= 0.0[/code] may evaluate to [code]true[/code] or [code]false[/code] depending on the number's value.
		[bool]s are usually used with the logical operators [code]and[/code], [code]or[/code], and [code]not[/code] to create complex conditions:
		[codeblocks]
		[gdscript]
		if bullets &gt; 0 and not is_reloading:
		    launch_bullet()

		if bullets == 0 or is_reloading:
		    play_clack_sound()
		[/gdscript]
		[csharp]
		if (bullets &gt; 0 &amp;&amp; !isReloading)
		{
		    launchBullet();
		}

		if (bullets == 0 || isReloading)
		{
		    playClackSound();
		}
		[/csharp]
		[/codeblocks]
	</description>
	<tutorials>
	</tutorials>
	<constructors>
		<constructor name="bool">
			<return type="bool" />
			<description>
				Constructs a default-initialized [bool] set to [code]false[/code].
			</description>
		</constructor>
		<constructor name="bool">
			<return type="bool" />
			<param index="0" name="from" type="bool" />
			<description>
				Constructs a [bool] as a copy of the given [bool].
			</description>
		</constructor>
		<constructor name="bool">
			<return type="bool" />
			<param index="0" name="from" type="float" />
			<description>
				Cast a [float] value to a boolean value. This method will return [code]false[/code] if [code]0.0[/code] is passed in, and [code]true[/code] for all other values.
			</description>
		</constructor>
		<constructor name="bool">
			<return type="bool" />
			<param index="0" name="from" type="int" />
			<description>
				Cast an [int] value to a boolean value. This method will return [code]false[/code] if [code]0[/code] is passed in, and [code]true[/code] for all other values.
			</description>
		</constructor>
	</constructors>
	<operators>
		<operator name="operator !=">
			<return type="bool" />
			<param index="0" name="right" type="bool" />
			<description>
				Returns [code]true[/code] if two bools are different, i.e. one is [code]true[/code] and the other is [code]false[/code].
			</description>
		</operator>
		<operator name="operator &lt;">
			<return type="bool" />
			<param index="0" name="right" type="bool" />
			<description>
				Returns [code]true[/code] if the left operand is [code]false[/code] and the right operand is [code]true[/code].
			</description>
		</operator>
		<operator name="operator ==">
			<return type="bool" />
			<param index="0" name="right" type="bool" />
			<description>
				Returns [code]true[/code] if two bools are equal, i.e. both are [code]true[/code] or both are [code]false[/code].
			</description>
		</operator>
		<operator name="operator &gt;">
			<return type="bool" />
			<param index="0" name="right" type="bool" />
			<description>
				Returns [code]true[/code] if the left operand is [code]true[/code] and the right operand is [code]false[/code].
			</description>
		</operator>
	</operators>
</class>