projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright 1995 Jim Van Zandt <jrv@vanzandt.mv.com> |
| 2 | .\" | |
| 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. | |
| 6 | .\" | |
| 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. | |
| c13182ef | 11 | .\" |
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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| 13 | .\" manual page may be incorrect or out-of-date.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 | |
| 18 | .\" professionally. | |
| c13182ef | 19 | .\" |
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20 | .\" Formatted or processed versions of this manual, if unaccompanied by |
| 21 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 22 | .\" | |
| 23 | .\" Modified 2002-07-27 Walter Harms | |
| 24 | .\" (walter.harms@informatik.uni-oldenburg.de) | |
| 25 | .\" | |
| 26 | .TH EXPM1 3 2002-07-27 "" "Linux Programmer's Manual" | |
| 27 | .SH NAME | |
| 28 | expm1, expm1f, expm1l \- exponential minus 1 | |
| 29 | .SH SYNOPSIS | |
| 30 | .nf | |
| 31 | .B #include <math.h> | |
| 32 | .sp | |
| 33 | .BI "double expm1(double " x ); | |
| d39541ec | 34 | .br |
| fea681da | 35 | .BI "float expm1f(float " x ); |
| d39541ec | 36 | .br |
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37 | .BI "long double expm1l(long double " x ); |
| 38 | .sp | |
| 39 | .fi | |
| e9329f6d | 40 | Link with \fI-lm\fP. |
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41 | .SH DESCRIPTION |
| 42 | .BI expm1( x ) | |
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43 | returns a value equivalent to `exp (\fIx\fP) \- 1'. |
| 44 | It is | |
| fea681da | 45 | computed in a way that is accurate even if the value of \fIx\fP is near |
| 2bc2f479 | 46 | zero\(ema case where `exp (\fIx\fP) \- 1' would be inaccurate due to |
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47 | subtraction of two numbers that are nearly equal. |
| 48 | .SH "CONFORMING TO" | |
| 49 | BSD, C99. | |
| c13182ef | 50 | The |
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51 | .I float |
| 52 | and | |
| 53 | .I "long double" | |
| 54 | variants are C99 requirements. | |
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55 | .SH "SEE ALSO" |
| 56 | .BR exp (3), | |
| 57 | .BR log (3), | |
| 58 | .BR log1p (3) |