ghci> [x*2 | x <– [1..10]]

[2,4,6,8,10,12,14,16,18,20]

ghci> [x*2 | x <– [1..10], x*2 >= 12]

[12,14,16,18,20]

ghci> [ x | x <– [50..100], x `mod` 7 == 3]

[52,59,66,73,80,87,94]