Is the log() function faulty?

When I use the log function [log (x)] to log the value 616, I am getting the answer 6.4232. However, when I calculate it on windows excel or my calculator I get 2.789580712.

I'd like to know why I am getting a different answer on Matlab.

Answer 1

[Stephen23]

The documentation tells us that in MATLAB log calculates the natural logarithm, and log10 the base ten logarithm.

>> log(616)
ans =  6.4232
>> log10(616)
ans =  2.7896

The MATLAB help is great: it tells us how MATLAB works. You should try using it.

[John D'Errico]

Oh, wait. You mean the help is there for us to read? Just think - all this time I've wasted, wondering what stuff does.

Answer 2

[CAS]

Thank you very much for your help!!!:)