Exponential Function

The exponential function, typically written in the form exp(x), raises the number e to the power x:

For x=0, exp(x) returns the value 1, for positive values of x, exp(x) extends to infinity and for negative values, it becomes asymptotic with zero as shown in the graph below:

Spreadsheets

Both MS Excel and Google Docs spreadsheet contain the exponential function

Programming languages

The exp function is part of the math library in most general programming languages.