fabs, fabsf
Collapse the table of content
Expand the table of content
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here. ArchiveDisclaimer

fabs, fabsf 

Calculates the absolute value of the floating-point argument.

double fabs( 
   double x 
float fabs(
   float x 
); // C++ only
long double fabs(
   long double x
); // C++ only
float fabsf( 
   float x 



Floating-point value.

fabs returns the absolute value of its argument. There is no error return.

Input SEH Exception Matherr Exception




C++ allows overloading, so you can call overloads of fabs. In a C program, fabs always takes and returns a double.

Function Required header Compatibility

fabs, fabsf


ANSI, Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

For additional compatibility information, see Compatibility in the Introduction.

See the example for abs.

© 2015 Microsoft