Description
The
log function computes the natural logarithm of
x. A domain error occurs is the
argument is negative. A range error may occur if the
argument is zero.
Returns
The
log function returns the natural logarithm.
Implementation Notes
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If the argument is zero, then
errno is set to ERANGE,
and -HUGE_VAL is returned.
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If the argument < zero, then
errno is set to EDOM,
and -HUGE_VAL is returned.
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