The Clone Command

Overview
The /Clone command is another useful block-oriented command that is useful for coding. This command copy-pastes an existing structure into a new area, which can be useful for symmetric structures that you'd rather not spend time building twice.

Syntax
/clone

Explanation
Much like the The Fill Command, the first 6 coordinates tell the computer what cubic area to copy. Remember, these are the two opposite corners, not 2 adjacent corners, of the box. If you write the coordinates for the back top left and the front bottom right of the structure, the computer can logically figure out where the rest of the lines are. The last 3 coordinates are the exact x y and z coordinates of where you are pasting your structure. Make sure that if you press F3, and you are facing north, the coordinates you type are the coordinates of the far bottom left corner. That is where the structure will be pasted, because the computer has no idea if you want it to do otherwise.

Trivia

 * Is also like the structure block, which also copy/pastes structures