Update app.py

app.py

@@ -4,36 +4,42 @@ st.set_page_config(page_title="Three-Field Calculator", layout="centered")
 
 st.title("🧮 Three-Field Calculator")
 
+st.write("Enter three numbers and choose an operation.")
+
 # Input fields
-num1 = st.number_input("Enter first number", value=0.0, step=0.1)
-num2 = st.number_input("Enter second number", value=0.0, step=0.1)
-num3 = st.number_input("Enter third number", value=0.0, step=0.1)
+num1 = st.number_input("Enter first number", value=0.0, step=1.0)
+num2 = st.number_input("Enter second number", value=0.0, step=1.0)
+num3 = st.number_input("Enter third number", value=0.0, step=1.0)
 
 # Operation selection
 operation = st.selectbox(
     "Select operation",
-    ["Addition", "Subtraction", "Multiplication", "Division"]
+    ("Addition", "Subtraction", "Multiplication", "Division")
 )
 
-# Perform calculation
+# Calculate button
+calculate = st.button("Calculate")
+
 result = None
 
-if operation == "Addition":
-    result = num1 + num2 + num3
+if calculate:
+    if operation == "Addition":
+        result = num1 + num2 + num3
 
-elif operation == "Subtraction":
-    result = num1 - num2 - num3
+    elif operation == "Subtraction":
+        result = num1 - num2 - num3
 
-elif operation == "Multiplication":
-    result = num1 * num2 * num3
+    elif operation == "Multiplication":
+        result = num1 * num2 * num3
+        if num2 == 0 or num3 == 0:
+            st.info("Multiplying by zero results in zero.")
 
-elif operation == "Division":
-    if num2 != 0 and num3 != 0:
-        result = num1 / num2 / num3
-    else:
-        st.error("Error! Division by zero.")
-        result = None
+    elif operation == "Division":
+        if num2 == 0 or num3 == 0:
+            st.error("Cannot divide by zero. Please enter non-zero values for second and third numbers.")
+        else:
+            result = num1 / num2 / num3
 
-# Display result
-if result is not None:
-    st.success(f"Result: {result}")
+    # Display result
+    if result is not None:
+        st.success(f"Result: {result}")