Question

Why is ln natural logarithm?

Answer 1

I think its because log e is ln so ln is a natural logarithm.

Answer 2

Logarithms with a base of "e" which is approximately equal to 2.71828, are called natural logarithms. Natural logarithms are represented by the abbreviation ln.

For example, ln 20 means that natural log of 20. Since the base of a natural log is e or 2.71828, the value of the natural log of 20 is approximately equal to 3 because 2.71828 to the 3rd power is approximately equal to 20.