def isNumeric(input_string):
    """
    Checks if the string `input_string` actually represents a number.

    :param string `input_string`: any string.

    :rtype: `bool`

    :returns: ``True`` if the `input_string` can be converted to a number (any number),
     ``False`` otherwise.
    """
    try:
        float(input_string)
        return True
    except ValueError:
        return False
