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Technical Reference: Base Operating System and Extensions, Volume 1

Japanese ctype Subroutines


Classify characters.


Standard Character Library (libc.a)


#include <ctype.h>

int isjalpha ( Character)
int Character;

int isjupper (Character)
int Character;

int isjlower (Character)
int Character;

int isjlbytekana (Character)
int Character;

int isjdigit (Character)
int Character;

int isjxdigit (Character)
int Character;

int isjalnum (Character)
int Character;

int isjspace (Character)
int Character;

int isjpunct (Character)
int Character;

int isjparen (Character)
int Character;

int isparent (Character)

int isjprint (Character)
int Character;

int isjgraph (Character)
int Character;

int isjis (Character)
int Character;

int isjhira (wc)
wchar_t wc;

int isjkanji (wc)

int isjkata (wc)
wchar_t wc;


The Japanese ctype subroutines classify character-coded integer values specified in a table. Each of these subroutines returns a nonzero value for True and 0 for False.


Character Character to be tested.

Return Values

The isjprint and isjgraph subroutines return a 0 value for user-defined characters.

Related Information

The ctype, isalpha, isupper, islower, isdigit, isxdigit, isalnum, isspace, ispunct, isprint, isgraph, iscntrl, or isascii Subroutines, and setlocale subroutine.

List of Character Manipulation Services and Subroutines, Example Programs, and Libraries in AIX 5L Version 5.2 General Programming Concepts: Writing and Debugging Programs.

National Language Support Overview in AIX 5L Version 5.2 National Language Support Guide and Reference.

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