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1 perry 1 !!!EXP
2 JohnMcPherson 2
1 perry 3 ----
4 !!NAME
5
6
7 exp, log, log10, pow - exponential, logarithmic and power functions
8 !!SYNOPSIS
9
10
11 __#include
12 __ ''x''__);
13 double log(double__ ''x''__);
14 double log10(double__ ''x''__);
15 double pow(double__ ''x''__, double__ ''y''__);
16 __
17 !!DESCRIPTION
18
19
20 The __exp()__ function returns the value of e (the base
21 of natural logarithms) raised to the power of
22 ''x''.
23
24
25 The __log()__ function returns the natural logarithm of
26 ''x''.
27
28
29 The __log10()__ function returns the base-10 logarithm of
30 ''x''.
31
32
33 The __pow()__ function returns the value of ''x''
34 raised to the power of ''y''.
2 JohnMcPherson 35
1 perry 36 !!ERRORS
37
38 The __log()__ and __log10()__ functions can return the
39 following errors:
40
41
2 JohnMcPherson 42 ;[EDOM]: The argument ''x'' is negative.
1 perry 43
44
2 JohnMcPherson 45 ;[ERANGE]: The argument ''x'' is zero. The log of zero is not defined.
1 perry 46
47
48 The __pow()__ function can return the following
49 error:
50
51
2 JohnMcPherson 52 ;[EDOM]: The argument ''x'' is negative and ''y'' is not an integral value. This would result in a complex number.
1 perry 53
54 !!CONFORMING TO
55
56
57 SVID 3, POSIX, BSD 4.3, ISO 9899
58 !!SEE ALSO
59
60
61 sqrt(3), cbrt(3)
62 ----
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