Namespaces
Variants
Views
Actions

std::signbit

From cppreference.com
< cpp‎ | numeric‎ | math
Revision as of 16:44, 1 July 2013 by P12bot (Talk | contribs)

 
 
 
Common mathematical functions
Functions
Basic operations
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
Exponential functions
(C++11)
(C++11)
(C++11)
(C++11)
Power functions
(C++11)
(C++11)
Trigonometric and hyperbolic functions
(C++11)
(C++11)
(C++11)
Error and gamma functions
(C++11)
(C++11)
(C++11)
(C++11)
Nearest integer floating point operations
(C++11)(C++11)(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
Floating point manipulation functions
(C++11)(C++11)
(C++11)
(C++11)
(C++11)(C++11)
(C++11)
Classification/Comparison
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
signbit
(C++11)
(C++11)
(C++11)
Macro constants
(C++11)(C++11)(C++11)(C++11)(C++11)
 
Defined in header <cmath>
bool signbit( float arg );
(since C++11)
bool signbit( double arg );
(since C++11)
bool signbit( long double arg );
(since C++11)


Determines if the given floating point number arg is negative.

Parameters

arg - floating point value

Return value

true if arg is negative, false otherwise

See also

absolute value of a floating point value (|x|)
(function) [edit]
(C++11)
copies the sign of a floating point value
(function) [edit]