Improve the docs for the float type

2 files changed, 9 insertions, 1 deletions

diff --git a/doc/classes/float.xml b/doc/classes/float.xml
index 60878eb0bd..4bf04fe25f 100644
--- a/doc/classes/float.xml
+++ b/doc/classes/float.xml
@@ -4,9 +4,13 @@
 		Float built-in type.
 	</brief_description>
 	<description>
-		Float built-in type.
+		The [float] built-in type is a 64-bit double-precision floating-point number, equivalent to [code]double[/code] in C++. This type has 14 reliable decimal digits of precision. The [float] type can be stored in [Variant], which is the generic type used by the engine. The maximum value of [float] is approximately [code]1.79769e308[/code], and the minimum is approximately [code]-1.79769e308[/code].
+		Many methods and properties in the engine use 32-bit single-precision floating-point numbers instead, equivalent to [code]float[/code] in C++, which have 6 reliable decimal digits of precision. For data structures such as [Vector2] and [Vector3], Godot uses 32-bit floating-point numbers by default, but it can be changed to use 64-bit doubles if Godot is compiled with the [code]float=64[/code] option.
+		Math done using the [float] type is not guaranteed to be exact or deterministic, and will often result in small errors. You should usually use the [method @GlobalScope.is_equal_approx] and [method @GlobalScope.is_zero_approx] methods instead of [code]==[/code] to compare [float] values for equality.
 	</description>
 	<tutorials>
+		<link title="Wikipedia: Double-precision floating-point format">https://en.wikipedia.org/wiki/Double-precision_floating-point_format</link>
+		<link title="Wikipedia: Single-precision floating-point format">https://en.wikipedia.org/wiki/Single-precision_floating-point_format</link>
 	</tutorials>
 	<methods>
 		<method name="float" qualifiers="constructor">
@@ -231,11 +235,13 @@
 		<method name="operator unary+" qualifiers="operator">
 			<return type="float" />
 			<description>
+				Returns the same value as if the [code]+[/code] was not there. Unary [code]+[/code] does nothing, but sometimes it can make your code more readable.
 			</description>
 		</method>
 		<method name="operator unary-" qualifiers="operator">
 			<return type="float" />
 			<description>
+				Returns the negative value of the [float]. If positive, turns the number negative. If negative, turns the number positive. With floats, the number zero can be either positive or negative.
 			</description>
 		</method>
 	</methods>
diff --git a/doc/classes/int.xml b/doc/classes/int.xml
index 84a01aa0d0..32b5fe1012 100644
--- a/doc/classes/int.xml
+++ b/doc/classes/int.xml
@@ -327,11 +327,13 @@
 		<method name="operator unary+" qualifiers="operator">
 			<return type="int" />
 			<description>
+				Returns the same value as if the [code]+[/code] was not there. Unary [code]+[/code] does nothing, but sometimes it can make your code more readable.
 			</description>
 		</method>
 		<method name="operator unary-" qualifiers="operator">
 			<return type="int" />
 			<description>
+				Returns the negated value of the [int]. If positive, turns the number negative. If negative, turns the number positive. If zero, does nothing.
 			</description>
 		</method>
 		<method name="operator |" qualifiers="operator">