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Document logical operator support in Expression

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Vojtech Krajnansky
2025-02-04 15:36:49 +01:00
committed by GitHub
parent adeaa6d0ce
commit 404a2bc96e
1 changed files with 14 additions and 0 deletions
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tutorials/scripting/evaluating_expressions.rst
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@@ -8,6 +8,7 @@ Godot provides an :ref:`class_Expression` class you can use to evaluate expressi
An expression can be:
- A mathematical expression such as ``(2 + 4) * 16/4.0``.
- A boolean expression such as ``true && false``.
- A built-in method call like ``deg_to_rad(90)``.
- A method call on a user-provided script like ``update_health()``,
if ``base_instance`` is set to a value other than ``null`` when calling
@@ -47,6 +48,12 @@ The following operators are available:
| Remainder (``%``) | Returns the remainder of an integer division (modulo). |
| | The result will always have the sign of the dividend. |
+------------------------+-------------------------------------------------------------------------------------+
| Conjunction (``&&``) | Returns the result of a boolean AND. |
+------------------------+-------------------------------------------------------------------------------------+
| Disjunction (``||``) | Returns the result of a boolean OR. |
+------------------------+-------------------------------------------------------------------------------------+
| Negation (``!``) | Returns the result of a boolean NOT. |
+------------------------+-------------------------------------------------------------------------------------+
Spaces around operators are optional. Also, keep in mind the usual
`order of operations <https://en.wikipedia.org/wiki/Order_of_operations>`__
@@ -141,6 +148,11 @@ The script below demonstrates what the Expression class is capable of::
func _ready():
# Constant boolean expression.
evaluate("true && false")
# Boolean expression with variables.
evaluate("!(a && b)", ["a", "b"], [true, false])
# Constant mathexpression.
evaluate("2 + 2")
# Math expression with variables.
@@ -181,6 +193,8 @@ The script below demonstrates what the Expression class is capable of::
The output from the script will be::
false
true
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