diff --git a/examples/abs b/examples/abs
index 85e39d7a724b857d1e70fd28cd3ace646264ba85..6830938ed4ad569fd434e2aefc6414cd48ed2a54 100644
--- a/examples/abs
+++ b/examples/abs
@@ -1,6 +1,6 @@
 abs ( x : int | y : int ) {
     assume x > 0;
-    if x[ 0 ] < 0 then y := 0 else skip ;
+    if x < 0 then { y := 0 } else { skip; skip; skip; skip } ;
     assert y > 0
 }
 
diff --git a/examples/memberOf b/examples/memberOf
index 624fa1495f47a2378ffaa1f63815a9c0e8fd9151..d137deb56db189cf33abac9756701d2fd31f4eb4 100644
--- a/examples/memberOf
+++ b/examples/memberOf
@@ -5,9 +5,9 @@ memberOf ( x : int , a :[] int | found : bool ) {
         k := 0 ;
         found := false ;
         while k <# a do {
-            if a [ k ]= x then found := true else skip ;
+            if a [ k ]= x then { found := true } else { skip } ;
             k := k +1
         }
     };
     assert found
-}
\ No newline at end of file
+}
diff --git a/examples/sumArray b/examples/sumArray
new file mode 100644
index 0000000000000000000000000000000000000000..607323c4c4bdea8c74b52599d4651346eafe8a19
--- /dev/null
+++ b/examples/sumArray
@@ -0,0 +1,12 @@
+sumArray(arr: []int, first: int, last: int | sum: int) {
+    assume (first >= 0 && last < #arr && first < last);
+    sum := 0;
+    current := first;
+
+    while (current <= last) do {
+        sum := sum + arr[current];
+        current := current + 1
+    }
+
+}
+