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Man Pages
ISSPECIAL(3) FreeBSD Library Functions Manual ISSPECIAL(3)

isspecial
special character test

Standard C Library (libc, -lc)

#include <ctype.h>
int
isspecial(int c);

The isspecial() function tests for a special character.

The isspecial() function returns zero if the character tests false and returns non-zero if the character tests true.

ctype(3), iswspecial(3)

The isspecial() function appeared in 4.4BSD.
March 30, 2004 FreeBSD 12.0-RELEASE

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