The natural log, denoted ln, is an alternative to the common log where the base of the logarithm is e instead of 10. The natural log of e is equal to 1, and all the same logarithmic laws for addition and multiplication apply as with common logs. The natural log is sometimes preferred over the common log as calculations are generally easier.

1. Natural Logs
Recall, log is called a "common log" ie. log
How about, called the natural log
Note, lne = 1
All log laws still apply
ex. ln(M · N) = lnM + lnN
Could use log or ln
Where to use ln?
again could use log or ln *ln easier