Unit Converter

def convert_length(value, from_unit, to_unit):
    # Define conversion factors
    length_factors = {
        "meters_to_feet": 3.28084,
        "feet_to_meters": 0.3048,
        "meters_to_miles": 0.000621371,
        # Add more conversion factors as needed
    }

    if from_unit == to_unit:
        return value  # No conversion needed
    else:
        conversion_key = f"{from_unit}_to_{to_unit}"
        if conversion_key in length_factors:
            return value * length_factors[conversion_key]
        else:
            return "Invalid conversion units"

def convert_weight(value, from_unit, to_unit):
    # Define conversion factors
    weight_factors = {
        "kilograms_to_pounds": 2.20462,
        "pounds_to_kilograms": 0.453592,
        # Add more conversion factors as needed
    }

    if from_unit == to_unit:
        return value  # No conversion needed
    else:
        conversion_key = f"{from_unit}_to_{to_unit}"
        if conversion_key in weight_factors:
            return value * weight_factors[conversion_key]
        else:
            return "Invalid conversion units"

def convert_temperature(value, from_unit, to_unit):
    if from_unit == "celsius" and to_unit == "fahrenheit":
        return (value * 9/5) + 32
    elif from_unit == "fahrenheit" and to_unit == "celsius":
        return (value - 32) * 5/9
    else:
        return "Invalid conversion units"

if __name__ == "__main__":
    print("Unit Converter")
    print("1. Length")
    print("2. Weight")
    print("3. Temperature")
    choice = int(input("Select a conversion type (1/2/3): "))

    if choice == 1:
        value = float(input("Enter the length value: "))
        from_unit = input("Enter the source unit (e.g., meters): ").lower()
        to_unit = input("Enter the target unit (e.g., feet): ").lower()
        result = convert_length(value, from_unit, to_unit)
        print(f"Result: {value} {from_unit} = {result} {to_unit}")

    elif choice == 2:
        value = float(input("Enter the weight value: "))
        from_unit = input("Enter the source unit (e.g., kilograms): ").lower()
        to_unit = input("Enter the target unit (e.g., pounds): ").lower()
        result = convert_weight(value, from_unit, to_unit)
        print(f"Result: {value} {from_unit} = {result} {to_unit}")

    elif choice == 3:
        value = float(input("Enter the temperature value: "))
        from_unit = input("Enter the source unit (celsius/fahrenheit): ").lower()
        to_unit = input("Enter the target unit (celsius/fahrenheit): ").lower()
        result = convert_temperature(value, from_unit, to_unit)
        print(f"Result: {value} {from_unit} = {result} {to_unit}")

    else:
        print("Invalid choice")