From 72af855cab43a55426ae052b55f752389fd0ef95 Mon Sep 17 00:00:00 2001
From: Martin Goik <goik@hdm-stuttgart.de>
Date: Wed, 10 Apr 2024 09:11:47 +0200
Subject: [PATCH] Hint abs(x - y)
---
.../languageFundamentals.xml | 32 +++++++++++++++++--
1 file changed, 29 insertions(+), 3 deletions(-)
diff --git a/Doc/Sd1/LanguageFundamentals/languageFundamentals.xml b/Doc/Sd1/LanguageFundamentals/languageFundamentals.xml
index 102717075..5d5b28617 100644
--- a/Doc/Sd1/LanguageFundamentals/languageFundamentals.xml
+++ b/Doc/Sd1/LanguageFundamentals/languageFundamentals.xml
@@ -5720,9 +5720,35 @@ System.out.println(2147483647 + 1L);</programlisting>
result and propose a solution.</para>
<tip>
- <para>You will have to replace the <quote>==</quote> operator
- by something more appropriate addressing limited arithmetic
- precision.</para>
+ <itemizedlist>
+ <listitem>
+ <para>You will have to relax the exact <quote>==</quote>
+ operator by a »being close to each other« relation
+ addressing the limited arithmetic precision.</para>
+ </listitem>
+
+ <listitem>
+ <para>The <methodname
+ xlink:href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Math.html#abs(double)">Math.abs()</methodname>
+ method calculates the absolute value:</para>
+
+ <informaltable border="1">
+ <tr>
+ <th>Code</th>
+
+ <th>Result</th>
+ </tr>
+
+ <tr>
+ <td valign="top"><programlisting language="java">System.out.println(Math.abs(10.7));
+System.out.println(Math.abs(-10.7));</programlisting></td>
+
+ <td valign="top"><screen>10.7
+10.7</screen></td>
+ </tr>
+ </informaltable>
+ </listitem>
+ </itemizedlist>
</tip>
</question>
--
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