# Why doesn't Mathematica reduce ln(e) to 1 by default? [duplicate]

Given D[eⁿ, n], Mathematica produces:

eⁿ Log[e]


Why? (Or rather, why not just eⁿ?)

• Case sensitivity. In particular, E != e. Aug 30 '17 at 14:19
• To add to that: note that when you type e in Mathematica it will be highlighted as blue, while E is black. Blue symbols don't have definitions (either user-defined or build-in), so the fact that e is blue is a hint that Mathematica considers it just to be a variable and nothing more. Aug 30 '17 at 14:37
• If you want to use the more familiar notation for the exponent, it's easily entered as esceeesc. This is rendered as a math double stroke lowercase e, but behaves as as the exponential E. D[\[ExponentialE]^n, n]===\[ExponentialE]^n Aug 30 '17 at 20:16

You want E (or esceeesc), not e.