log1p
From cppreference.com
| Defined in header
<math.h>
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| float log1pf( float arg );
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(since C99) | |
| double log1p( double arg );
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(since C99) | |
| long double log1pl( long double arg );
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(since C99) | |
Computes the natural (base e) logarithm of 1+arg. This function is more precise than the expression log(1+arg) if arg is close to zero.
[edit] Parameters
| arg | - | floating point value |
[edit] Return value
ln(1+arg)
Domain error occurs if arg is negative. NAN is returned in that case.
Range error occurs if arg is 0. -HUGE_VAL is returned in that case.
[edit] See also
| computes natural (base e) logarithm (to base e) (ln(x)) (function) |
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| computes common (base 10) logarithm (log10(x)) (function) |
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C++ documentation for log1p
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