R Under development (unstable) (2023-11-07 r85491 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  q u a d . R  Test suite
> ##
> 
> 
> quad <- pracma::quad
> 
> all.equal(quad(sin, 0, pi), 2, tol = 1e-7)
[1] TRUE
> all.equal(quad(sin, 0, 2*pi), 0, tol = 1e-7)
[1] TRUE
> all.equal(quad(exp, 0, 1), exp(1) - 1, tol=1e-7)
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.10    0.07    0.17