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1 perry 1 EXP
2 !!!EXP
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 ERRORS
7 CONFORMING TO
8 SEE ALSO
9 ----
10 !!NAME
11
12
13 exp, log, log10, pow - exponential, logarithmic and power functions
14 !!SYNOPSIS
15
16
17 __#include
18 __ ''x''__);
19 double log(double__ ''x''__);
20 double log10(double__ ''x''__);
21 double pow(double__ ''x''__, double__ ''y''__);
22 __
23 !!DESCRIPTION
24
25
26 The __exp()__ function returns the value of e (the base
27 of natural logarithms) raised to the power of
28 ''x''.
29
30
31 The __log()__ function returns the natural logarithm of
32 ''x''.
33
34
35 The __log10()__ function returns the base-10 logarithm of
36 ''x''.
37
38
39 The __pow()__ function returns the value of ''x''
40 raised to the power of ''y''.
41 !!ERRORS
42
43
44 The __log()__ and __log10()__ functions can return the
45 following errors:
46
47
48 __EDOM__
49
50
51 The argument ''x'' is negative.
52
53
54 __ERANGE__
55
56
57 The argument ''x'' is zero. The log of zero is not
58 defined.
59
60
61 The __pow()__ function can return the following
62 error:
63
64
65 __EDOM__
66
67
68 The argument ''x'' is negative and ''y'' is not an
69 integral value. This would result in a complex
70 number.
71 !!CONFORMING TO
72
73
74 SVID 3, POSIX, BSD 4.3, ISO 9899
75 !!SEE ALSO
76
77
78 sqrt(3), cbrt(3)
79 ----
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