integral of the besselj function

how to count the integral of the besselj function from 0 to 4pi?

Answer 1

[Walter Roberson]

syms nu x
result = int(besselj(nu, x), x, 0, 4*sym(pi))

result = 

Bessel J is a family of functions, distinguished by the ν value. You cannot get much of a result unless you specify the ν value you want to work with.

result0 = int(besselj(0, x), x, 0, 4*sym(pi))

result0 = 

vpa(result0)

ans = 

0.8340841018533418306979596564232

[Olga Skorupa]

thank you ;)))))