TCharacter.IsNumber
Check if a Unicode character is a number
Declaration
Source position: character.pas line 120
public
class function IsNumber(AChar: UnicodeChar) : Boolean; Overload
; Static;
class function IsNumber(const AString: UnicodeString; AIndex: Integer)
: Boolean; Overload; Static;
Description
IsNumber returns True if a Unicode character has category that is one of the number categories (ucDecimalNumber, ucLetterNumber, ucOtherNumber). The character can be specified as a UTF16 character AChar or a UTF16 encoded character starting at position AIndex in string AString.
Errors
If AIndex is not a valid character index in the string AString, an EArgumentOutOfRangeException exception is raised. If the character at that position is not complete, an EArgumentException exception is raised.
See also
Name | Description |
---|---|
IsControl | Check whether a Unicode character is a Unicode control character |
IsDigit | Check whether a Unicode character is a digit |
IsHighSurrogate | Check whether a Unicode character is a surrogate in the high range |
IsLetter | Check if a Unicode character is a letter. |
IsLetterOrDigit | Check if a Unicode character is a letter or digit |
IsLower | Check if a Unicode character is a lowercase letter |
IsLowSurrogate | Check whether a Unicode character is a surrogate in the low range |
IsNumber | Check if a Unicode character is a number |
IsPunctuation | Check if a Unicode character is a punctuation character |
IsSurrogate | Check whether a Unicode character is a surrogate |
IsSurrogatePair | Check if a pair of characters is a set of high/low surrogate characters |
IsSymbol | Check if a Unicode character is a symbol character |
IsUpper | Check whether a Unicode character is an uppercase letter |
IsWhiteSpace | Check whether a Unicode character is a whitespace character |