Update app.py

app.py

@@ -21,7 +21,7 @@ def sum_of_two(a,b):
 st.markdown("<h3 style='text-align:center; font-size:24px;'>Mathematical and String Operations</h3>", unsafe_allow_html=True)
 radio_bar = st.sidebar.radio(options=[description1, description2, description3, description4, description5, description6, description7, description8, description9], label="Select any one:")
 if radio_bar == description1:
-    st.markdown("<h6 style='text-align:center; font-size:16px;'>{description1}</h6>", unsafe_allow_html=True)
+    st.markdown("<h6 style='text-align:center; font-size:16px;'>f"{description1}"</h6>", unsafe_allow_html=True)
     first_num = st.number_input(label="Enter First Number",value=None)
     second_num = st.number_input(label="Enter Second Number",value=None)
     all_data = st.button("Calculate result")