+Euler's number, *e*, is a fundamental [Constant](/wiki/constant) approximately 2.71828, crucial in mathematics. It is the unique base of the [Natural Logarithm](/wiki/natural_logarithm) and appears naturally in [Calculus](/wiki/calculus), modeling continuous growth and decay processes.
+## See also
+- [Exponential Function](/wiki/exponential_function)
+- [Compound Interest](/wiki/compound_interest)
+- [Logarithm](/wiki/logarithm)
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