Euler's number

Named after Swiss mathematician Leonhard Euler (1707–1783), who did, however, not discover it, although he likely gave the constant its modern symbol ${\displaystyle e}$.

Euler's number

1. (mathematics) The mathematical constant e, the base of the natural logarithm; an irrational, transcendental number approximately equal to 2.71828.

Should not be confused with Euler's constant, which often refers to other constants, most notably the constant ${\displaystyle \gamma }$ (also known as the Euler–Mascheroni constant).

• Napier's constant