diff --git a/app.py b/app.py
index 3428f26..01c71a5 100644
--- a/app.py
+++ b/app.py
@@ -72,6 +72,24 @@ def armstrong():
     print(n,"is an Armstrong number")
   else:
     print(n,"is not an Armstrong number")
+  
+  def strong():
+   sum=0  
+   num=int(input("Enter a number:"))   
+   temp=num   
+   while(num):  
+     i=1   
+     fact=1  
+     rem=num%10  
+     while(i<=rem):  
+         fact=fact*i 
+         i=i+1  
+    sum=sum+fact  
+    num=num//10  
+   if(sum==temp):  
+     print("Given number is a strong number")  
+   else:  
+     print("Given number is not a strong number")  
 
 if __name__=='__main__':
   add()
@@ -80,5 +98,7 @@ def armstrong():
   prime()
   print_factors()
   palindrome()
+  armstrong()
+  strong()