Update introduction.md (exercism#2031)

myucesan · jmrunkle · web-flow · commit 9ce86e5a957c · 2021-10-06T10:47:19.000-07:00
* Update introduction.md

Added examples and added more explanation on the operators.

* Update introduction.md

Merged with previous line per suggestion

* Update java/concepts/booleans/introduction.md

Added =&gt; mirroring the comments in the about.md

* Update concepts/booleans/introduction.md

Co-authored-by: Jason Runkle &lt;jmrunkle@gmail.com&gt;

Co-authored-by: Jason Runkle &lt;jmrunkle@gmail.com&gt;
diff --git a/concepts/booleans/introduction.md b/concepts/booleans/introduction.md
@@ -2,4 +2,19 @@
 
 Booleans in Java are represented by the `boolean` type, which values can be either `true` or `false`.
 
-Java supports three boolean operators: `!` (NOT), `&&` (AND), and `||` (OR).
+Java supports three boolean operators:  
+
+- `!` (NOT): negates the boolean  
+- `&&` (AND): takes two booleans and results in true if they're both true  
+- `||` (OR): results in true if any of the two booleans is true  
+
+**Examples**
+
+```java
+!true // => false
+!false // => true
+true && false // => false
+true && true // => true
+false || false // => false
+false || true // => true
+```
