app.py

import streamlit as st

# App title
st.title("Simple Calculator (+, -)")

# Input numbers
num1 = st.number_input("Enter first number:", format="%.2f")
num2 = st.number_input("Enter second number:", format="%.2f")

# Operation selection
operation = st.radio("Choose operation:", ("Addition (+)", "Subtraction (-)"))

# Perform calculation
if st.button("Calculate"):
    if operation == "Addition (+)":
        result = num1 + num2
        st.success(f"Result: {num1} + {num2} = {result}")
    elif operation == "Subtraction (-)":
        result = num1 - num2
        st.success(f"Result: {num1} - {num2} = {result}")