Create app.py

app.py

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+import streamlit as st
+
+st.set_page_config(page_title="Simple Calculator", layout="centered")
+
+st.title("🧮 Simple Calculator")
+
+# User input
+num1 = st.number_input("Enter the first number", value=0.0)
+num2 = st.number_input("Enter the second number", value=0.0)
+operation = st.selectbox("Select operation", ["Addition (+)", "Subtraction (-)", "Multiplication (*)", "Division (/)"])
+
+# Calculate result
+def calculate(n1, n2, op):
+    if op == "Addition (+)":
+        return n1 + n2
+    elif op == "Subtraction (-)":
+        return n1 - n2
+    elif op == "Multiplication (*)":
+        return n1 * n2
+    elif op == "Division (/)":
+        if n2 != 0:
+            return n1 / n2
+        else:
+            return "Error: Division by zero"
+
+# Show result
+if st.button("Calculate"):
+    result = calculate(num1, num2, operation)
+    st.success(f"Result: {result}")