Parameters

c

A Unicode character.

Returns

A double representing the numeric value associated with c if and only if c has an associated numeric value; otherwise, -1.0.

Remarks

A character has an associated numeric value if and only if it is a member of one of the following categories in System.Globalization.UnicodeCategory: System.Globalization.UnicodeCategory.DecimalDigitNumber, System.Globalization.UnicodeCategory.LetterNumber, or System.Globalization.UnicodeCategory.OtherNumber.

Example

The following example demonstrates the char.GetNumericValue(char) method.

C# Example

using System;
public class GetNumericValueExample {
public static void Main() {
   Char[] cAry = {'8', 'V', Convert.ToChar(0X00BC)};
   //Unicode U+00BC is the code point for the character 
   //representation of 1/4
   foreach(Char c in cAry) {
      Console.Write("Numeric value of Unicode " +
                    "character {0} ", c);
      Console.WriteLine(" is {0}",
                        Char.GetNumericValue(c));
   }
}
}

The output is

Numeric value of Unicode character 8 is 8
Numeric value of Unicode character V is -1
Numeric value of Unicode character 1/4 is 0.25

Requirements

Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0