How to read LN in mathematics?

How to read LN in mathematics?

It is a sign of a special base in the operation sign of logarithm
Generally, if there is a ^ B = n, then B is called the logarithm of n with a as the base, and B = Logan
(there's no way to say that a should be lower. Its bottom is the same height as the bottom of the letter g.)
When a = 10, it is abbreviated as LGN;
When a = e (E is about 2.718...) Lnn is called natural logarithm