Query: ctype
OS: freebsd
Section: 3
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CTYPE(3) BSD Library Functions Manual CTYPE(3)NAMEdigittoint, isalnum, isalpha, isascii, isblank, iscntrl, isdigit, isgraph, ishexnumber, isideogram, islower, isnumber, isphonogram, isprint, ispunct, isrune, isspace, isspecial, isupper, isxdigit, toascii, tolower, toupper -- character classification functionsLIBRARYStandard C Library (libc, -lc)SYNOPSIS#include <ctype.h> int digittoint(int c); int isalnum(int c); int isalpha(int c); int isascii(int c); int iscntrl(int c); int isdigit(int c); int isgraph(int c); int ishexnumber(int c); int isideogram(int c); int islower(int c); int isnumber(int c); int isphonogram(int c); int isspecial(int c); int isprint(int c); int ispunct(int c); int isrune(int c); int isspace(int c); int isupper(int c); int isxdigit(int c); int toascii(int c); int tolower(int c); int toupper(int c);DESCRIPTIONThe above functions perform character tests and conversions on the integer c. They are available as macros, defined in the include file <ctype.h>, or as true functions in the C library. See the specific manual pages for more information.SEE ALSOdigittoint(3), isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), isideogram(3), islower(3), isphonogram(3), isprint(3), ispunct(3), isrune(3), isspace(3), isspecial(3), isupper(3), isxdigit(3), toascii(3), tolower(3), toupper(3), wctype(3), ascii(7)STANDARDSThese functions, except for digittoint(), isascii(), ishexnumber(), isideogram(), isnumber(), isphonogram(), isrune(), isspecial() and toascii(), conform to ISO/IEC 9899:1990 (``ISO C90'').BSDMarch 30, 2004 BSD