diff --git a/QueueLink.java b/QueueLink.java
index 9d8f774..5a439b2 100644
--- a/QueueLink.java
+++ b/QueueLink.java
@@ -3,7 +3,7 @@
 // A linked list (LL) node to store a queue entry
 class QNode
 {
-    int key;
+    int key = 0;
     QNode next;
      
     // constructor to create a new linked list node
@@ -78,4 +78,4 @@ public static void main(String[] args)
          
         System.out.println("Dequeued item is "+ q.dequeue().key);
     }
-}
\ No newline at end of file
+}
diff --git a/StackDemo.java b/StackDemo.java
index c9d9ca7..281ca92 100644
--- a/StackDemo.java
+++ b/StackDemo.java
@@ -1,7 +1,7 @@
     public class StackDemo {  
      private static final int capacity = 3;  
      int arr[] = new int[capacity];  
-     int top = -1;  
+     int top = 0;  
       
      public void push(int pushedElement) {  
       if (top < capacity - 1) {