/// <summary> Recognizes a the exponent part of a scientific number notation.
/// It can be e12, E-1, jfun.yan.etc.
/// </summary>
/// <returns> the Pattern object.
/// </returns>
public static Pattern IsExponential()
{
return(Patterns.Sequence(Among(new char[] { 'e', 'E' }), IsChar('-').Optional(), IsInteger()));
}
