Update app.py

app.py

@@ -18,11 +18,16 @@ def sum_of_two(a,b):
     else:
         return(sum1)
 
-st.markdown("<h5 style='text-align:center; font-size:24px;'>Mathematical and String Operations</h5>", unsafe_allow_html=True)
+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)
     first_num = st.number_input(label="Enter First Number",value=None)
     second_num = st.number_input(label="Enter Second Number",value=None)
-    if st.button("Calculate result"):
-        result = sum_of_two(first_num,second_num)
-        st.success(f"Answer = {result}")
+    all_data = st.button("Calculate result")
+    if all_data:
+        if first_num == "" and second_num == "":
+            st.warning("Please Fill Above Fields")
+        else:
+            result = sum_of_two(first_num,second_num)
+            st.success(f"Answer = {result}")