[sddhrthrt]

it probably helps more to type out the program in a logical order - in the order of execution, like a pre-order traversal of the (module-dependency) tree.

say, in c, you could type the main, and when there is a function call, go there and type it, understand, come back.. that way you get the flow of it and you'll understand the whole code in one go.

Yes, it helps to type.