diff --git a/calculator/__init__.py b/calculator/__init__.py
index db9d1f6..1fe898a 100755
--- a/calculator/__init__.py
+++ b/calculator/__init__.py
@@ -17,7 +17,27 @@ def ADD():
     sum=a+b
     response = "sum of 2 numbers = " + str(sum)
     return response
+
+@app.route("/expo", methods=["POST"])
+def expo(): 
+    jsonStr = request.get_json()
+    jsonObj = json.loads(jsonStr)
     
+    a=int(jsonObj['N1'])
+    b=int(jsonObj['N2'])
+    x=a
+    y=b
+ 
+    ans=1;
+    while(b):
+   
+        if(b&1): ans = (ans*a)
+        a = (a*a)
+        b=b>>1
+    
+    response = str(x) + "to the power " +str(y)+ " equals " +str(ans) 
+    return response 
+
 @app.route("/xyz", methods=["POST"])
 def XYZ(): 
     jsonStr = request.get_json()
@@ -29,15 +49,6 @@ def XYZ():
     # Logic for function assigned to you as in pdf
     
     return 1
-def subtract(a,b):
-    jsonStr = request.get_json()
-    jsonObj = json.loads(jsonStr)
-    a=int(jsonObj['N1'])
-    b=int(jsonObj['N2'])
-    return a-b
-    
-    
-    
 
 if __name__== "__main__":
-    app.run()
+    app.run()
\ No newline at end of file
diff --git a/calculator/templates/InputOutput.html b/calculator/templates/InputOutput.html
index 542075a..8603086 100755
--- a/calculator/templates/InputOutput.html
+++ b/calculator/templates/InputOutput.html
@@ -10,7 +10,8 @@ <h2>Example</h2>
 	<form name="my_form" >
 		Please enter first  number &nbsp; <input type="text" name = "N1"><br>
         	Please enter second  number &nbsp; <input type="text" name = "N2"><br>        
-		<input type="button" class="btn btn-sm" onclick="submitData('add')" value="add">	
+		<input type="button" class="btn btn-sm" onclick="submitData('add')" value="add">
+		<input type="button" class="btn btn-sm" onclick="submitData('expo')" value="expo">	
 		<input type="button" class="btn btn-sm" onclick="submitData('xyz')" value="xyz">
 		<!-- Add your input statements here -->
 	</form>