INFNAN - Online Linux Manual PageSection : 3
Updated : 1993-06-02
Source : GNU
Note : Linux Programmer's Manual

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NAMEinfnan − deal with infinite or not-a-number (NaN) result

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SYNOPSIS#include <math.h> double infnan(int error);Link with −lm.

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DESCRIPTIONThe infnan() function returns a suitable value for infinity and "not-a-number" (NaN) results. The value of error can be ERANGE to represent infinity or anything else to represent NaN. errno is also set.

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RETURN VALUEIf error is ERANGE (Infinity), HUGE_VAL is returned. If error is −ERANGE (−Infinity), −HUGE_VAL is returned. If error is anything else, NAN is returned.

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ERRORSEDOM  The value of error is "not-a-number" (NaN). ERANGE  The value of error is positive infinity or negative infinity.

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CONFORMING TO4.3BSD.

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NOTESThis obsolete function was provided in libc4 and libc5, but is not available in glibc2.

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COLOPHONThis page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 0

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