Rev | Author | # | Line |
---|---|---|---|
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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