app.py

import streamlit as st

# Function to convert temperatures
def convert_temperature(value, from_unit, to_unit):
    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  # In case of same unit conversion

# Streamlit app
st.title("Temperature Converter")

# Input temperature
temperature = st.number_input("Enter the temperature:", format="%.2f")

# Select the unit of the input temperature
from_unit = st.selectbox("Select the unit of the input temperature:", ["Celsius", "Fahrenheit", "Kelvin"])

# Select the unit to convert to
to_unit = st.selectbox("Select the unit to convert to:", ["Celsius", "Fahrenheit", "Kelvin"])

# Convert and display the result
if st.button("Convert"):
    converted_temperature = convert_temperature(temperature, from_unit, to_unit)
    st.success(f"{temperature} {from_unit} is equal to {converted_temperature:.2f} {to_unit}.")