E (mathematical constant)
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e is a mathematical constant forming the basis of the natural logarithm and it is considered to be one of the most important numbers in mathematics. e cannot be expressed as a rational number, since it is an irrational number, like π. To the 20th decimal place:
e ≈ 2.71828182845904523536
[edit] Definitions
There are many definitions of the constant e. One of them is given below:
