SIGNBIT(3) | FreeBSD Library Functions Manual | SIGNBIT(3) |
NAME
signbit — determine whether a floating-point number's sign is negativeLIBRARY
Math Library (libm, -lm)DESCRIPTION
The signbit() macro takes an argument of x and returns non-zero if the value of its sign is negative, otherwise 0.STANDARDS
The signbit() macro conforms to ISO/IEC 9899:1999 (“ISO C99”).HISTORY
The signbit() macro was added in FreeBSD 5.1.July 18, 2004 | FreeBSD |