Update app.py

app.py

@@ -0,0 +1,36 @@
+# File: app.py
+import streamlit as st
+
+def calculate(num1, num2, operation):
+    if operation == 'Add':
+        return num1 + num2
+    elif operation == 'Subtract':
+        return num1 - num2
+    elif operation == 'Multiply':
+        return num1 * num2
+    elif operation == 'Divide':
+        if num2 != 0:
+            return num1 / num2
+        else:
+            return "Error: Division by zero"
+
+def main():
+    st.title('Simple Calculator')
+    
+    # Input for first number
+    num1 = st.number_input('Enter first number', value=0.0)
+    
+    # Operation selection
+    operation = st.selectbox('Select operation', 
+                             ['Add', 'Subtract', 'Multiply', 'Divide'])
+    
+    # Input for second number
+    num2 = st.number_input('Enter second number', value=0.0)
+    
+    # Calculate button
+    if st.button('Calculate'):
+        result = calculate(num1, num2, operation)
+        st.success(f'Result: {result}')
+
+if __name__ == '__main__':
+    main()