Question

Can you please tell me how can I copy some lines of code in Notepad ++, along with its lines number ?

That is, supposed I have a code.txt opened by notepad ++ like this (numbers are displayed by using Settings –> Preferences –> Editing –> Display line number):

1 This is line 1
2 This is line 2 
.
.
n This is line n

I want to copy it into a .doc / .odt file so that the line number is included in the result, NOT like this:

This is line 1
This is line 2 
    .
    .
This is line n

Answer 1

You should add line number to your document opened in nodepad++. Then you copied to .doc or other files. To realize this, there may be two ways. For both two ways.
Select your lines in nodepad++.

1) Use TextFX->TextFX Tools->Insert line numbers.

Instead to this,
2) To remove unnecessary leading zeros

2.1)First Left indent
TextFX->TextFX Edit->Indent text sticky left margin

2.2)Add numbers
Edit->Column Editors
in Number to Insert

• Set Intial Number 1
• Increase by 1
• Choose Dec option.

I hope this will help.