cabsf man page on FreeBSD

Man page or keyword search:  
man Server   9747 pages
apropos Keyword Search (all sections)
Output format
FreeBSD logo
[printable version]

HYPOT(3)		 BSD Library Functions Manual		      HYPOT(3)

NAME
     hypot, hypotf, hypotl, cabs, cabsf, cabsl — Euclidean distance and com‐
     plex absolute value functions

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     hypot(double x, double y);

     float
     hypotf(float x, float y);

     long double
     hypotl(long double x, long double y);

     #include <complex.h>

     double
     cabs(double complex z);

     float
     cabsf(float complex z);

     long double
     cabsl(long double complex z);

DESCRIPTION
     The hypot(), hypotf() and hypotl() functions compute the sqrt(x*x+y*y) in
     such a way that underflow will not happen, and overflow occurs only if
     the final result deserves it.  The cabs(), cabsf() and cabsl() functions
     compute the complex absolute value of z.

     hypot(∞, v) = hypot(v, ∞) = +∞ for all v, including NaN.

ERROR (due to Roundoff, etc.)
     Below 0.97 ulps.  Consequently hypot(5.0, 12.0) = 13.0 exactly; in gen‐
     eral, hypot and cabs return an integer whenever an integer might be
     expected.

NOTES
     As might be expected, hypot(v, NaN) and hypot(NaN, v) are NaN for all
     finite v.	But programmers might be surprised at first to discover that
     hypot(±∞, NaN) = +∞.  This is intentional; it happens because hypot(∞, v)
     = +∞ for all v, finite or infinite.  Hence hypot(∞, v) is independent of
     v.	 Unlike the reserved operand fault on a VAX, the IEEE NaN is designed
     to disappear when it turns out to be irrelevant, as it does in hypot(∞,
     NaN).

SEE ALSO
     carg(3), math(3), sqrt(3)

HISTORY
     Both a hypot() function and a cabs() function appeared in Version 7 AT&T
     UNIX.

STANDARDS
     The hypot(), hypotf(), hypotl(), cabs(), cabsf(), and cabsl() functions
     conform to ISO/IEC 9899:1999 (“ISO C99”).

BSD				March 30, 2008				   BSD
[top]

List of man pages available for FreeBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
...................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net