NAME
stdbool —
standard boolean types
SYNOPSIS
#include
<stdbool.h>
DESCRIPTION
The<stdbool.h> header defines
four macros:
- bool, which expands to _Bool;
- true, which expands to the integer constant 1;
- false, which expands to the integer constant 0; and
- __bool_true_false_are_defined, which expands to the constant 1.
The ability to undefine and redefine the macros bool, true, and false is an obsolescent feature that may be withdrawn in a future version of a standard.
SEE ALSO
STANDARDS
The <stdbool.h>
header conforms to ISO/IEC 9899:1999
(“ISO C99”) and IEEE Std
1003.1-2001 (“POSIX.1”).
HISTORY
The <stdbool.h>
header was first introduced in NetBSD 1.6.