streamlit_app.py

import streamlit as st

st.title('Calculator')

num1 = st.number_input('Enter first number')
num2 = st.number_input('Enter second number')

operation = st.selectbox('Select operation', ['Add', 'Subtract', 'Multiply', 'Divide'])

if operation == 'Add':
    result = num1 + num2
elif operation == 'Subtract':
    result = num1 - num2
elif operation == 'Multiply':
    result = num1 * num2
elif operation == 'Divide':
    if num2 == 0:
        result = 'Cannot divide by zero'
    else:
        result = num1 / num2

st.write('Result: ', result)