When your code don't behave as you expect, use the debugger to see what it does, you will know the why by inspecting the variables.
Quote:I found out that, the table contains 156 rows but in for loop after 86th row the cell value gets empty. Why is that?
Since your code do not depend on the row number, your code behavior depend on the sheet contain. You are the only one that can do something.
There is a tool that allow you to see what your code is doing, its name is debugger
. It is also a great learning tool because it show you reality and you can see which expectation match reality.
When you don't understand what your code is doing or why it does what it does, the answer is debugger
Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia
Debugging in Excel VBA - EASY Excel Macros
MS Excel 2013: VBA Debugging Introduction
How to debug Excel VBA - YouTube
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.