diff --git a/leap/leap.py b/leap/leap.py
index 50fd034..9d28156 100644
--- a/leap/leap.py
+++ b/leap/leap.py
@@ -1,2 +1,11 @@
 def leap_year(year):
-    pass
+    if(year % 400 == 0):
+        return(True)
+    elif(year % 4 ==0):
+        if (year % 100 == 0):
+            return(False)
+        else:
+            return(True)
+    else:
+        return(False)
+