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isprint() -- ctype Function (libc) Check if a character is printable #include <ctype.h> int isprint(c) int c; isprint() is a macro that tests if c is printable, i.e, if it is neither a delete nor a control character. It returns a number other than zero if c is a printable character, and zero if it is not. isprint() assumes that c is an ASCII character or EOF. Example For an example of how to use this macro, see the entry for ctype.h. See Also ASCII, libc ANSI Standard, §7.3.1.7 POSIX Standard, §8.1