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ISPRINT(3) FreeBSD Library Functions Manual ISPRINT(3) NAME isprint, isprint_l - printing character test (space character inclusive) LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <ctype.h> int isprint(int c); int isprint_l(int c, locale_t loc); DESCRIPTION The isprint() and isprint_l() functions test for any printing character, including space (` '). The value of the argument must be representable as an unsigned char or the value of EOF. In the ASCII character set, this includes the following characters (with their numeric values shown in octal): 040 sp 041 ``!'' 042 ``"'' 043 ``#'' 044 ``$'' 045 ``%'' 046 ``&'' 047 ``''' 050 ``('' 051 ``)'' 052 ``*'' 053 ``+'' 054 ``,'' 055 ``-'' 056 ``.'' 057 ``/'' 060 ``0'' 061 ``1'' 062 ``2'' 063 ``3'' 064 ``4'' 065 ``5'' 066 ``6'' 067 ``7'' 070 ``8'' 071 ``9'' 072 ``:'' 073 ``;'' 074 ``<'' 075 ``='' 076 ``>'' 077 ``?'' 100 ``@'' 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'' 133 ``['' 134 ``\'' 135 ``]'' 136 ``^'' 137 ``_'' 140 ```'' 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'' 173 ``{'' 174 ``|'' 175 ``}'' 176 ``~'' The isprint_l() function takes an explicit locale argument, whereas the isprint() function uses the current global or per-thread locale. RETURN VALUES The isprint() and isprint_l() functions return zero if the character tests false and return non-zero if the character tests true. COMPATIBILITY The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered obsolete and may not be supported in future releases. The iswprint() or iswprint_l() function should be used instead. SEE ALSO ctype(3), ctype_l(3), iswprint(3), iswprint_l(3), xlocale(3), ascii(7) STANDARDS The isprint() function conforms to ISO/IEC 9899:1990 ("ISO C90"). HISTORY The isprint() function first appeared in Version 7 AT&T UNIX. FreeBSD 14.1-RELEASE-p8 December 19, 2022 FreeBSD 14.1-RELEASE-p8