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Is there a way to generate a number sequence in vi or Vim? For example, for an arbitrary range of lines i through j (where i < j ) in a file opened in Vim, is there a way to generate a number sequence from number 1 on line i all the way through number ( j − i + 1) on line j ? Say, I have the following lines in a file: this is line #1 this is line #2 this is line #3 this is line #4 this is line #5 this is line #6 this is line #7 this is line #8 this is line #9 this is line #10 I want to prefix the number sequence from line 4 to line 8 with numbers 1 through 5. After the operation, the resulting file should be as follows: this is line #1 this is line #2 this is line #3 1 this is line #4 2 this is line #5 3 this is line #6 4 this is line #7 5 this is line #8 this is line #9 this is line #10 If this is possible, is there a way to use different step sizes for the generated sequence? For example, can 2 be used for the step size instead, so that the resulting sequence is 2, 4, 6, 8, etc.? Note: The question “ How to add line numbers to range of lines in Vim? ” brings up a similar problem, but it is not the same.

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