func1_val = func1(x,y)
             

x: x is an IDL floating_point and the value of the first root of the Lane-Emden equation

y: y is an IDL dblarr that represents the scaled mass density. y is defined as follows: mass density equals a constant lambda times phi raised to the power n, where n is the polytropic index in the range [0.,4.999999] and lambda is a scaling parameter identified by the central desity of the star, thereby normalizing the function phi to unity at the center

lane: lane is a common block that contains n, the polytropic index in the range [0.,4.999999].

func1: func1 is an IDL floating_point and is needed for the IDL pro lane_emden_root.

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