Can you get the logarithm of a negative number?

Answer 1

No. Logarithms are not defined for 0 or negative numbers.

However, if we use complex numbers, ln -1 equals 3.1416i or pii and

log -1 equals ~ 1.36i

Ans. 2

Although logarithms are not defined for negative numbers, if you want to use logs just for the multiplication or division of non-zero real numbers it is easy to do.

• make a note of how many of the operands are negative
• if there are an odd number of negatives, write down "minus"
• use the logs as if all numbers are positive
• if you wrote down minus, put a minus sign before the result.