How I could show that :$\mathrm{log}1=0$?

I would be like somone to show me or give me a prove for this :

Why $\mathrm{ln}1=0$?

Note that $\mathrm{ln}$ is logarithme népérien, the natural logarithm of a number is its logarithm to the base $e$.

Thanks for any replies or any comments!

I would be like somone to show me or give me a prove for this :

Why $\mathrm{ln}1=0$?

Note that $\mathrm{ln}$ is logarithme népérien, the natural logarithm of a number is its logarithm to the base $e$.

Thanks for any replies or any comments!