Functions
Function	E1 (X As Double, Optional Info As Long) As Double
	Exponential integral E1(x)

Function	Ei (X As Double, Optional Info As Long) As Double
	Exponential integral Ei(x)

Function	En (X As Double, N As Long, Optional Info As Long) As Double
	Exponential integral En(x)

Function	Li (X As Double, Optional Info As Long) As Double
	Logarithmic integral li(x)

Function	Spence (X As Double, Optional Info As Long) As Double
	Spence's function (dilogarithm) Li2(x)

Sub	E1_sub (Ret As Double, X As Double, Optional Info As Long)
	Exponential integral E1(x) (Subroutine version)

Sub	Ei_sub (Ret As Double, X As Double, Optional Info As Long)
	Exponential integral Ei(x) (Subroutine version)

Sub	En_sub (Ret As Double, X As Double, N As Long, Optional Info As Long)
	Exponential integral En(x) (Subroutine version)

Sub	Li_sub (Ret As Double, X As Double, Optional Info As Long)
	Logarithmic integral li(x) (Subroutine version)

Sub	Spence_sub (Ret As Double, X As Double, Optional Info As Long)
	Spence's function (dilogarithm) Li2(x) (Subroutine version)

Detailed Description

This is the group of C5. Exponential and logarithmic integrals.

Functions