Removing a line from the buffer in a vim script

According to http://vimdoc.sourceforge.net/htmldoc/usr_41.html#function-list vim script has functions setline() and append() to modify the current buffer but how do i delete a line from within a script? With setline(1, "") the line is only emptied but I want to get r开发者_StackOverflow中文版id of it.

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You use the ex command :d. :5d deletes line 5.

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One addition: don’t do execute line 'delete', do execute line 'delete _': deleting to black hole register has a minimal number of side-effects. Without _ it will delete to default register, numbered register 1 and will move all other numbered registers (except 0 which is for yanks): 1->2, 2->3, …, 9->void.

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@ahe
1delete
%delete
1,$delete

no need for execute here