How do I add line numbers to multiple lines using visual block?

Explanation

Visual block insert can add numbered prefixes to lines. Combined with g<C-a>, you can create an incrementing numbered list.

How it works

1. Select lines with <C-v> and j
2. Press I and type 0. (or 1. )
3. Press <Esc> to apply to all lines
4. Reselect with gv and press g<C-a> to make numbers increment

Example

Starting with:

apple
banana
cherry

After <C-v>2jI0. <Esc>gvg<C-a>:

1. apple
2. banana
3. cherry

Tips

• g<C-a> creates incrementing sequences in visual mode
• This technique works for any numbered list
• Adjust the starting number as needed
• Can also be done with :let i=1 | '<,'>g/^/s//\=i.'. '/|let i+=1