What does ln mean? and also how is it used?

Apr 7, 2017

$\ln$ stands for 'natural logarithm'.

Explanation:

If the term 'logarithm' means anything to you:
On your calculator you find two buttons for them:
The $\log$ button, where logs are calculated to the base $10$,
and $\ln$ that calculates logs to the base $e$.

Logs (both kinds) are used for compressing large measuring scales, like the deciBel scale for sound, and also in exponential and periodic functions.