+"1e", known as [Euler's Number](/wiki/Euler's_Number), is a pivotal mathematical constant, roughly 2.71828. This irrational and transcendental value forms the base of the [natural logarithm](/wiki/Natural_logarithm), fundamental to exponential change in nature and science.
+## See also
+- [Logarithm](/wiki/Logarithm)
+- [Calculus](/wiki/Calculus)
+- [Exponential Growth](/wiki/Exponential_Growth)
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