ISALNUM(3) MachTen Programmer’s Manual ISALNUM(3)

NAME
isalnum - alphanumeric character test

SYNOPSIS
#include <ctype.h>

int
isalnum(int c);

DESCRIPTION
The isalnum() function tests for any character for which isalpha(3) or
isdigit(3) is true. In the ASCII character set, this includes the fol-
lowing characters:

060 ‘‘0’’ 061 ‘‘1’’ 062 ‘‘2’’ 063 ‘‘3’’ 064 ‘‘4’’
065 ‘‘5’’ 066 ‘‘6’’ 067 ‘‘7’’ 070 ‘‘8’’ 071 ‘‘9’’
101 ‘‘A’’ 102 ‘‘B’’ 103 ‘‘C’’ 104 ‘‘D’’ 105 ‘‘E’’
106 ‘‘F’’ 107 ‘‘G’’ 110 ‘‘H’’ 111 ‘‘I’’ 112 ‘‘J’’
113 ‘‘K’’ 114 ‘‘L’’ 115 ‘‘M’’ 116 ‘‘N’’ 117 ‘‘O’’
120 ‘‘P’’ 121 ‘‘Q’’ 122 ‘‘R’’ 123 ‘‘S’’ 124 ‘‘T’’
125 ‘‘U’’ 126 ‘‘V’’ 127 ‘‘W’’ 130 ‘‘X’’ 131 ‘‘Y’’
132 ‘‘Z’’ 141 ‘‘a’’ 142 ‘‘b’’ 143 ‘‘c’’ 144 ‘‘d’’
145 ‘‘e’’ 146 ‘‘f’’ 147 ‘‘g’’ 150 ‘‘h’’ 151 ‘‘i’’
152 ‘‘j’’ 153 ‘‘k’’ 154 ‘‘l’’ 155 ‘‘m’’ 156 ‘‘n’’
157 ‘‘o’’ 160 ‘‘p’’ 161 ‘‘q’’ 162 ‘‘r’’ 163 ‘‘s’’
164 ‘‘t’’ 165 ‘‘u’’ 166 ‘‘v’’ 167 ‘‘w’’ 170 ‘‘x’’
171 ‘‘y’’ 172 ‘‘z’’

RETURN VALUES
The isalnum() function returns zero if the character tests false and re-
turns non-zero if the character tests true.