1 assert(std.math.approxEqual(besselJ(2, 1), 2 0.5767248077568733872024482422691)); 3 assert(std.math.approxEqual(besselJ(20, 1), 4 0.066833124175850045578992974193)); 5 assert(std.math.approxEqual(besselJ(1, 1.2), 0.351884));
See Implementation