The logarithm with constant e as base is called natural logarithm, denoted by ln^N(N>0).

It means the maximum value that can be achieved through continuous doubling growth within a unit of time.

The base of the natural logarithm, e, is given by an important limit. We define: as x goes to infinity, lim(1+1/x)^x=e.

e is an infinite non-repeating decimal, its value is approximately equal to 2.718281828…, it is a transcendental number.