E mathematical symbol is an important constant in mathematics, and its value is about 2.7 1828, which is the base of natural logarithm. E mathematical symbols have important applications in calculus, probability theory, complex analysis and other fields, such as solving limits, differential equations, Taylor series and so on. In addition, the mathematical symbol of e is closely related to Euler formula and complex number.

In addition to the base of natural logarithm, e mathematical symbol has different meanings and applications in other fields.