use builtin function

api/hanyadikhetvan/__init__.py

@@ -0,0 +1,11 @@
+from math import floor
+from datetime import date
+import azure.functions as func
+
+
+def main(req: func.HttpRequest) -> func.HttpResponse:
+    startdate = date(2022, 2, 6)
+    currentweek = floor((date.today() - startdate).days / 7)
+    return func.HttpResponse(
+        str(currentweek),
+        status_code=200)