The program given below demonstrates the three static methods IsDigit, IsPunctuation, and IsSeparator. It also shows that the casting (type conversion) of a character to the numeric type short
reveals the code position (code point) of a character. You get the same result if you cast
to longer numeric integer types. The output of the program is The method GetNumericValue is intended to be used on characters that represent digits in decimal numbers.
As an example, Char.GetNumericValue('2') is equal to the number 2 in type double.
If applied on non-digit characters, GetNumericValue returns -1.0.
Notice that Char.GetNumericValue('a') is -1.0; In contexts where we work with hexadecimal numbers
it would have been useful if Char.GetNumericValue('a') returned 10.using System;
using System.Globalization;
class CharDemo{
public static void Main(){
Console.WriteLine(Char.IsDigit('.'));
Console.WriteLine(Char.IsDigit('5'));
Console.WriteLine(Char.IsDigit(' '));
Console.WriteLine();
Console.WriteLine(Char.IsPunctuation('.'));
Console.WriteLine(Char.IsPunctuation('5'));
Console.WriteLine(Char.IsPunctuation(' '));
Console.WriteLine();
Console.WriteLine(Char.IsSeparator('.'));
Console.WriteLine(Char.IsSeparator('5'));
Console.WriteLine(Char.IsSeparator(' '));
Console.WriteLine();
Console.WriteLine("ch1: {0}", (short)'A');
Console.WriteLine("ch1: {0}", (short)'Æ');
}
}
False
True
False
True
False
False
False
False
True
ch1: 65
ch1: 198