1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" References consulted:
24 .\" Linux libc source code
25 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
27 .\" Modified Sat Jul 24 19:42:57 1993 by Rik Faith (faith@cs.unc.edu)
28 .\" Modified Aug 14 1995 by Arnt Gulbrandsen <agulbra@troll.no>
30 .\" Translated into german by Markus Schmitt (fw@math.uni-sb.de)
32 .TH EXP 3 "1. Juli 1996" "GNU" "Bibliotheksfunktionen"
35 exp, log, log10, pow - Exponentialfunktion, Logarithmenfunktionen und Potenzfunktionen
40 .BI "double exp(double " x );
42 .BI "double log(double " x );
44 .BI "double log10(double " x );
46 .BI "double pow(double " x ", double " y );
51 gibt den Wert von e hoch
57 gibt den natürlichen Logarithmus von
63 gibt den Logarithmus zur Basis 10 von
79 können folgende Fehler zurückliefern:
89 ist 0. Der Logarithmus von 0 ist nicht definiert.
93 kann folgenden Fehler zurückliefern:
98 ist negativ und das Argument
100 ist keine ganze Zahl.
101 Dies würde eine komplexe Zahl darstellen.
103 SVID 3, POSIX, BSD 4.3, ISO 9899