STDBOOL(3) Library Functions Manual STDBOOL(3)
NAME
stdboolstandard boolean types
SYNOPSIS
#include <stdbool.h>
DESCRIPTION
The <stdbool.h> header defines four macros:
1.
bool, which expands to _Bool;
2.
true, which expands to the integer constant 1;
3.
false, which expands to the integer constant 0; and
4.
__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The ability to undefine and redefine the macros bool, true, and false is an obsolescent feature that may be withdrawn in a future version of a standard.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.