def list_to_string(s, separator='-'):
    """
    Convert a list of numeric types to a string with the same information.

    Arguments
    ---------
    s : list of integers

    separator : a placeholder between strings

    Returns
    -------
    string

    Example
    -------
    >>> list_to_string( [0,1], "-" )
    """
    str1 = ""
    for ele in s:
        str1 += (separator+str(ele))
    return str1