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CBRT(3P) POSIX Programmer's Manual CBRT(3P)PROLOGThis manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may dif- fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.NAMEcbrt, cbrtf, cbrtl - cube root functionsSYNOPSIS#include<math.h>doublecbrt(doublex);floatcbrtf(floatx);longdoublecbrtl(longdoublex);DESCRIPTIONThese functions shall compute the real cube root of their argumentx.RETURNVALUEUpon successful completion, these functions shall return the cube root ofx. Ifxis NaN, a NaN shall be returned. Ifxis ?0 or ?Inf,xshall be returned.ERRORSNo errors are defined.Thefollowingsectionsareinformative.EXAMPLESNone.APPLICATIONUSAGENone.RATIONALEFor some applications, a true cube root function, which returns negative results for negative arguments, is more appropriate thanpow(x, 1.0/3.0), which returns a NaN forxless than 0.FUTUREDIRECTIONSNone.SEEALSOThe Base Definitions volume of IEEE Std 1003.1-2001,<math.h>COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan- dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifica- tions Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Stan- dard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE/The Open Group 2003 CBRT(3P)