Is there a way to insert the IDE code line into my code as a variable?

Basically my title is the question, so for example i insert in my code a comment like:

//This is needed on line 150.

The number 150 is a variable.

Now of course, if i enter new code between line 1 and line 150, lets say 10 new lines of code, this variable gets changed in my code to

//This is needed online 160.

Is there a function or addon for that?