function handle for random function

If I want to know the integral of the function log(x) from 0 to 1, I do the following:

fun = @(x)log(x);
q1 = integral(fun,0,1)

but, how can I calculate the integral of the function randn() for x between 0 and 100?

[Rik]

You have to separate the two notions of what a function is: you can use integral for a mathematical function, but randn is a Matlab function.

So you need to explain what would you even mean by taking the integral of the randn function.