Update app.py

app.py

@@ -80,7 +80,7 @@ def app_design():
     # Make a prediction when the user clicks the "Predict" button
     if st.button('Predict Grade'):
         predicted_value = model_prediction(model, features)
-        if int(predicted_value[1:-1])<=0:
+        if '-' in predicted_value:
             st.success(f"Student Grade is: 0")    
         else:
             st.success(f"Student Grade is: {predicted_value}")