diff --git a/app.py b/app.py
index daaf97e..13e47ca 100644
--- a/app.py
+++ b/app.py
@@ -33,7 +33,15 @@ def prime():
   else:
     print("False")
         
-
+def perfect_square():
+  n = int(input("Enter a number: "))
+  x = n // 2
+    y = set([x])
+    while x * x != n:
+        x = (x + (n // x)) // 2
+        if x in y: return False
+        y.add(x)
+    return True
 
 if __name__=='__main__':
   add()