import streamlit as st

st.title("Simple Calculator App")

name = st.text_input("Enter your name", "Type here...")

st.write(f"Hello, {name}! Welcome to the calculator app.")
st.subheader("Select a number")
# The slider returns the number the user selects
x = st.slider("Choose a value for x", 0, 100, 25) # min, max, default

st.subheader("Type a number")
# The number_input returns the number the user types
y = st.number_input("Enter a value for y", 0, 100, 10) # min, max, default

st.subheader("Choose an operation")
# The selectbox returns the string of the selected option
operation = st.selectbox(
    "What operation do you want to perform?",
    ('Add', 'Subtract', 'Multiply', 'Divide') # The options
)

# Perform calculation based on the widget values
st.write(f"Performing calculation: `{x} {operation} {y}`")

if operation == 'Add':
    result = x + y
elif operation == 'Subtract':
    result = x - y
elif operation == 'Multiply':
    result = x * y
elif operation == 'Divide' and y != 0:
    result = x / y
else:
    result = "Cannot divide by zero"

st.success(f"The result is: **{result}**")