Python's list comprehensions are close to set notation in math. Here's Python:

    [2*x for x in range(n + 1) if x <= 100]

Here's set notation:

    {2*x | x in 0..n, x <= 100}

So it reads pretty easily for those of us used to set notation. Haskell is even more similar to set notation:

    [2*x | x <- [0..n], x <= 100]