added removeFirst to ArrayManipulation

ArrayManipulation.java

@@ -14,9 +14,21 @@ public class ArrayManipulation {
 
     }
 
+    public static int[] removeFirst(int[] arr) {
+        if (arr == null || arr.length < 1) {
+            return arr;
+        }
+        int[] result = new int[arr.length-1];
+        for (int i = 0; i < result.length; i++) {
+            result[i] = arr[i+1];
+        }
+        return result;
+    }
+
     public static void main(String[] args) {
        
         int[] arr = {1,2,3,4,5};
-        System.out.println(Arrays.toString(reverseArray(arr)));   
+        System.out.println(Arrays.toString(reverseArray(arr)));
+        System.out.println(Arrays.toString(removeFirst(arr)));        
     }
 }