doc: add match statement to sample file

doc/sample/Expressions.im

@@ -6,13 +6,15 @@ x = ((1 + 2 * 3) multiplyBy:3).
 p = 5 multiply(by:3 add:(2 + 1)).
 q = 10 squared squared.
 
+
+
 p1
     setAge:2 squared squared + 4 squared multiply(by:2 add:4 + 1 * 3)
     in:"mon" + "ths".
 
 M = xz multiply(by:3 add:2) squared.
 
-M = xz multiplyBy:3 add:2; yourself.
+M = xz multiply(by:3 add:2); squared.
 
 x = OrderedCollection new
 	add: 2;
@@ -24,10 +26,25 @@ x = OrderedCollection new
 age = Person new(name:"John Doe" age:34)
     setAge:144 inUnit:"months";
     ageInMonths.
+
+
+
+x = 5.
+q = 10 if x > 2.
+q = if x > 2 then 10 else 20 end.
+
+cout put:5 multiply(by:5 add:2) if x > 2.
+
+if x > 2 then
+	cout put:"Greater"
+else
+	cout put:"Less"
+end
 */
 
---x = 5.
---q = 10 if x > 2.
---q = if x > 2 then 10 else 20 end.
-
-cout put:5 multiply(by:5 add:2) if x > 2.
+Q = match yz in
+	1 => age = age,
+	2 => age = age / 12,
+	3 => age = age / 365,
+	_ => age = 0
+end.