Exp Exponential function. This function lets you calculate e (2.71828182846...) to the power of a linear function of the input value. By using the default parameters, you get a standard exponential function, i.e., exp(x). Default parameter values: a = 1, b = 1, c = 0 Example: a = 1, b = 1, c = 0 Input = 4.2 => Output = 66.686 Input = 3.5 => Output = 33.115