iscntrl function — Tests for a control character
int iscntrl(int c)
The iscntrl
function
returns true (nonzero) if c
is a
control character. The set of control characters depends on the
locale and character set. In the 7-bit ASCII character set, the
control characters are '\0
'-'\x1F
' and '\x7F
'; other implementations might have
different control characters. By definition, a control character is
any character that is not a printable character (isprint
).