def isfloat(s:str) -> bool:
    """ Functions to determine if the parameter s can be represented as a float
    Parameters:
    -----------
        * s [str]: string which could be or not a float.
    Return:
    -------
        * True: s can be represented as a float.
        * False: s cannot be represented as a float.
    """
    float_c = list(".0123456789")
    if not all([c in float_c for c in s]):
        return False
    return True