[Haskell-beginners] Concatenating lists

Hi, I've just started to learn Haskell and played around a bit and tried this 1: let x = [1,2,3] 2: let x = x ++ [4,5,6] 3: x The last line doesn't give a result. I assume that this is because 'x' is a name of a value, in the second line I redefine 'x' to a new value but Haskell doesn't evaluate the value until the last line but then 'x' becomes recursively defined in itself (the second x on line 2 is interpreted to refer to the value of the first x on line 2 and not the value defined in line 1). This behavior is caused by the lazy evaluation in Haskell. Have I understood this correctly? - jem