BesselI

BesselI[n, z] gives the modified Bessel function of the first kind I_n(z).

Examples

Modified Bessel function:

BesselI[0, 0]
(* 1 *)

BesselI[1, 0]
(* 0 *)

Numerical evaluation:

N[BesselI[0, 1]]
(* 1.26607 *)

N[BesselI[2, 3]]
(* 2.24521 *)

Please visit the official Wolfram Language Reference for more details.