E (mathematical constant) - Simple English Wikipedia, the free encyclopedia

# E (mathematical constant)

### From Simple English Wikipedia, the free encyclopedia

e is a mathematical constant. It also has other names, like Euler's number (because of the Swiss mathematician Leonhard Euler), or Napier's constant (because of the Scottish mathematician John Napier). It is an important number in math, like π and i. It is an irrational number, which means it is impossible to write as a fraction with two integers; but some numbers, like 2.71828182845904523536 come close to the real value.

## [edit] Definitions

The true value of e is a number that never ends, but one definition is the solution to this formula:

## [edit] The first 200 places of the number e

The first 200 digits after the comma are:

      .

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Category: Number theory

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