xHarbour Reference Documentation > Function Reference

IsGraph()

Checks if the first character of a string is a 7-bit graphical ASCII character.

Syntax

IsGraph( <cString> ) --> lIs7BitGraphicalChar

Arguments

<cString>

A character string to check for its first character.

Return

The function returns .T. (true) when the leftmost character of a string belongs to the 7-bit ASCII character set with a graphical representation, otherwise .F. (false).

Description

The function is used to check if a string begins with a character that belongs to the 7-bit ASCII character set that has a grahpical representation (ASCII values 33 - 126). It returns .T. (true) when the ASCII value of the first character is within the range of 33 to 126, and .F. (false) when it begins with any other character.

Info

See also:	IsAlNum(), IsAlpha(), IsAscii(), IsCntrl(), IsDigit(), IsLower(), IsPrint(), IsPunct(), IsSpace(), IsUpper(), IsXDigit(), Lower(), Upper()
Category:	Character functions , xHarbour extensions
Source:	rtl\is.c
LIB:	xhb.lib
DLL:	xhbdll.dll

Example

// The example lists all 7-bit ASCII values with a graphical
// representation to a file

   PROCEDURE Main
      LOCAL i

      SET ALTERNATE TO IsGraph.txt
      SET ALTERNATE ON

      FOR i := 0 TO 255
         IF IsGraph( Chr(i) )
            ?? Chr(i), i
            ?
         ENDIF
      NEXT

   RETURN