def zodiac_horoscope(user_sign):
    """ Using conditionals, assigns a certain horoscope to be returned based on user's sign.   
    
        Parameters
        ----------
        user_sign : str
            The user's zodiac sign as determined by their birthday.      
        
        Returns
        -------
        output : str
            Prints a string corresponding to user's sign. """
    
    if user_sign == "Aquarius" :
        output = "you will meet many new friends!"
        return output
    elif user_sign == "Pisces":
        output = "you will find a new hobby!"
        return output
    elif user_sign == "Aries":
        output = "your love life will be exciting!"
        return output
    elif user_sign == "Taurus":
        output = "you will receive an unexpected gift."
        return output
    elif user_sign == "Gemini":
        output = "you will run into an old friend."
        return output
    elif user_sign == "Cancer":
        output = "you will grow closer to your family."
        return output
    elif user_sign == "Leo":
        output = "you will try something you've never done before."
        return output
    elif user_sign == "Virgo":
        output = "you will let loose and have fun!"
        return output
    elif user_sign == "Libra":
        output = "you will get more serious about an upcoming project."
        return output
    elif user_sign == "Scorpio":
        output = "you will have a lot of creative energy!"
        return output
    elif user_sign == "Sagittarius":
        output = "you will throw a lot of parties!"
        return output
    elif user_sign == "Capricorn":
        output = "you will find success in your career!"
        return output