Added yield definition

source/ch4_conditionals.ptx

@@ -194,39 +194,38 @@ Java also supports a <c>switch</c> statement that acts something like the <c>eli
         <p><idx><c>switch</c></idx>
             The <c>switch</c> statement in Java provides a clean and efficient alternative to chaining multiple <c>if-else</c> conditions, especially when comparing a single variable against several constant values. It supports a variety of data types, including primitive types (<c>byte</c>, <c>short</c>, <c>char</c>, <c>int</c>), their wrapper classes, <c>enumerations</c>, and <c>String</c> (introduced in Java 7). Each <c>case</c> within a <c>switch</c> must be defined using a constant expression, and duplicate <c>case</c> values are not permitted. By default, control flow "<c>falls through</c>" from one <c>case</c> to the next unless a <c>break</c>, <c>return</c>, or <c>throw</c> statement is used to terminate execution. 
         </p>
-        <p><idx><c>switch</c> expressions</idx>
-            Java 14 introduced <c>switch</c> <term>expressions</term>, enhancing functionality by allowing the <c>switch</c> to return values and eliminating <c>fall-through</c> via the <c>-&gt;</c> arrow syntax. These expressions can even use <c>yield</c> within code blocks for more complex evaluations. It’s important to note that traditional <c>switch</c> statements do not support <c>null</c> values and will throw a <c>NullPointerException</c> if evaluated with <c>null</c>. As the language evolves, newer versions of Java continue to extend <c>switch</c> capabilities with features like <c>pattern matching</c> and enhanced <c>type handling</c>, making it a more powerful and expressive tool for decision-making in Java programs.
-        </p>
-
-
-
 
+        <p>
+            <idx><c>switch</c> expressions</idx>
+            <idx><c>yield</c></idx>
+            Java 14 introduced <c>switch</c> <term>expressions</term>, enhancing functionality by allowing the <c>switch</c> to return values and eliminating <c>fall-through</c> via the <c>-&gt;</c> arrow syntax. These expressions can even use <c>yield</c> within code blocks for more complex evaluations. <term><c>yield</c></term> is used inside a switch expression’s block to produce the value of that expression, unlike <c>break</c> which simply exits a switch statement or loop. It’s important to note that traditional <c>switch</c> statements do not support <c>null</c> values and will throw a <c>NullPointerException</c> if evaluated with <c>null</c>. As the language evolves, newer versions of Java continue to extend <c>switch</c> capabilities with features like <c>pattern matching</c> and enhanced <c>type handling</c>, making it a more powerful and expressive tool for decision-making in Java programs.
+        </p>
 
         <program interactive="activecode" language="java">
             <code>
-public class SwitchUp {
-    public static void main(String args[]) {
-     int grade = 85;
-     int tempgrade = grade / 10;
-     switch(tempgrade) {
-     case 10:
-     case 9:
-         System.out.println('A');
-         break;
-     case 8:
-         System.out.println('B');
-         break;
-     case 7:
-         System.out.println('C');
-         break;
-     case 6:
-         System.out.println('A');
-         break;
-     default:
-         System.out.println('F');
-     }
-   }
- }
+            public class SwitchUp {
+                public static void main(String args[]) {
+                int grade = 85;
+                int tempgrade = grade / 10;
+                switch(tempgrade) {
+                case 10:
+                case 9:
+                    System.out.println('A');
+                    break;
+                case 8:
+                    System.out.println('B');
+                    break;
+                case 7:
+                    System.out.println('C');
+                    break;
+                case 6:
+                    System.out.println('A');
+                    break;
+                default:
+                    System.out.println('F');
+                }
+            }
+            }
             </code> <tests> </tests>
         </program>