Exponential Integral (Not in Base Package)

Computes the exponential integral function. Details  

	x is the input argument.
	n is the exponent parameter.
	En(x) returns the value of the exponential integral function.

Exponential Integral Details

The following equation defines the exponential integral function.

The following intervals for the input values define the exponential integral function.

LabVIEW supports the entire domain of this function that produces real-valued results. For any nonnegative integer value of order n, the function is defined for nonnegative real values of x.