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• Last Updated : 23 Jan, 2020

With the help of `scipy.integrate.fixed_quad()` method, we can get the computation of a definite integral using fixed order gaussian quadrature by using `scipy.integrate.fixed_quad()` method.

Syntax : `scipy.integrate.fixed_quad(func, a, b, n)`
Return : Return the computed value of a definite integral.

Example #1 :
In this example we can see that by using `scipy.integrate.fixed_quad()` method, we are able to get the definite integral using fixed order gaussian quadrature by using this method.

 `# import scipy.integrate``from` `scipy ``import` `integrate``func ``=` `lambda` `x: x``*``*``3`` ` `# using scipy.integrate.fixed_quad() method``gfg ``=` `integrate.fixed_quad(func, ``0.0``, ``1.0``, n ``=` `2``) ``# n is the order of integration`` ` `print``(gfg)`

Output :

0.24999999999999997

Example #2 :

 `# import scipy.integrate``from` `scipy ``import` `integrate``func ``=` `lambda` `x: x``*``*``2` `+` `4` `*` `x ``+` `4`` ` `# using scipy.integrate.fixed_quad() method``gfg ``=` `integrate.fixed_quad(func, ``1.0``, ``2.0``, n ``=` `2``) ``# n is the order of integration`` ` `print``(gfg)`

Output :

12.333333333333332

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