Update app.py

app.py

@@ -46,7 +46,7 @@ def math(number1:int, number2:int, operator: str) -> str:
         return f"{number1} + {number2} = {number1 + number2}"
     elif operator == 'SUBTRACT':
         return f"{number1} - {number2} = {number1 - number2}"
-    else
+    else:
         return f"The operator {operator} is not valid, use either ADD or SUBTRACT"