To get vim to delete lines between n to n, use the range expression with the delete command. e.g To delete lines 30 - 40 of the file you have open:
If you want, use the
. to as a shortcut reference the current line. This is useful if you quickly want to say delete x lines from above my current position. e.g:
To delete n lines above, use
ndk e.g. go up to the first line needing to be deleted then:
101dk would delete 101 lines above.