app.py

import streamlit as st

def convert_temperature(value, from_unit, to_unit):
    """Convert temperature between Celsius, Fahrenheit, and Kelvin."""
    if from_unit == "Celsius":
        if to_unit == "Fahrenheit":
            return value * 9/5 + 32
        elif to_unit == "Kelvin":
            return value + 273.15
    elif from_unit == "Fahrenheit":
        if to_unit == "Celsius":
            return (value - 32) * 5/9
        elif to_unit == "Kelvin":
            return (value - 32) * 5/9 + 273.15
    elif from_unit == "Kelvin":
        if to_unit == "Celsius":
            return value - 273.15
        elif to_unit == "Fahrenheit":
            return (value - 273.15) * 9/5 + 32
    return value

def main():
    st.set_page_config(page_title="Temperature Converter", page_icon="🌡", layout="wide")
    st.title("🌡 Temperature Converter")

    st.sidebar.header("Conversion Settings")

    # Input Section
    st.sidebar.subheader("Temperature Input")
    value = st.sidebar.number_input("Enter temperature value:", value=0.0, step=0.1, format="%.1f")
    from_unit = st.sidebar.selectbox("From Unit:", ["Celsius", "Fahrenheit", "Kelvin"], index=0)
    to_unit = st.sidebar.selectbox("To Unit:", ["Celsius", "Fahrenheit", "Kelvin"], index=1)

    # Columns for layout
    col1, col2 = st.columns(2)

    with col1:
        st.subheader("Input Details")
        st.write(f"**Temperature Value:** {value:.2f} {from_unit}")

    with col2:
        st.subheader("Conversion Result")
        if st.sidebar.button("Convert"):
            if from_unit == to_unit:
                result = value
                st.write(f"The temperature remains the same: {result:.2f} {to_unit}")
            else:
                result = convert_temperature(value, from_unit, to_unit)
                st.write(f"Converted Temperature: {result:.2f} {to_unit}")
        else:
            st.write("Click the Convert button to see the result.")

    st.sidebar.markdown("---")
    st.sidebar.info(
        "This application allows you to convert temperatures between Celsius, Fahrenheit, and Kelvin units with ease!"
    )

if __name__ == "__main__":
    main()