Data Type - char

System.Char

Char Class

This deals with individual characters
Represents a 16 bit unicode character
With Option Strict On you must convert a String type such as "A" into a Character type by using CChar()
Smallest value is \u000
Largest value is \uFFFF
The Char data type can hold a single Unicode character
The Char class represents a single character.
This class exposes a number of useful shared methods that let you test a single character according to several criteria
All of these methods are overloaded and take either a single Char or a String plus an index in the string

Char.IsDigit("1"c) 
Char.IsDigit("A123!,0) 

Char.IsLetter(" ") 
Char.IsLetterOrDigit(" ") 
Char.IsLower(" ") 
Char.IsUpper(" ") 
Char.IsPunctuation(" ") 
Char.IsSymbol(" ") 
Char.IsWhiteSpace(" ") 
Char.IsControl(" ") 

string mystring; 
mystring = new string(System.Convert.ToChar(90),1); 

The Char type represents a Unicode character
If you want to assign a single characeter literal to a Char variable you must use the literal character C to force the string to a Char data type

char myChar; 
myChar = "X"C; 
myChar = 'A';   

It is possible to represent an escape character by prefixing with the backslash character.

myChar = '\n';  
myChar = '\u0031';  
myChar = '\x0031';  

Any Char variables are initialised to ""

Explicit conversion

When assigning a literal character to a Char variable you should yse a trailing "c" to make it explicit that the character must be converted to a Char before assignment.

char myChar; 
myChar = "A"c; 

The following line will cause a complilation error

char myChar; 
myChar = "ABC"c; 

Char Structure Methods

GetNumericValue -
GetUnicodeCategory
IsDigit -
IsLetter -
IsUpper -
IsLower -
IsNumber -