Principle purpose of this assignment is to Define and Discuss on Exponential Functions. Here explain Exponential Functions in Calculus terms with proper mathematical examples. A exponential function is in the form f( x) = a , for some real amount a, as long as a > 0. While dramatical functions accept any actual number input for a, the range is limited to positive numbers. This article briefly explain on Natural exponential function and Graphs of exponential functions.