Analysis on the scope of variables in bash Loops

Let's take a look at a piece of wrongCode.

Copy codeThe Code is as follows :#! /Bin/bash
For X in 'ls */.*/.*'
Cat $ X | Do echo $ x
While read line
Do
C = 'echo $ Line | awk-f' (''{print $1 }''
# Echo $ C
I = $ (I + $ C ))
Done
Echo
Done
Echo $ I

What is the problem with the above Code?
The pipeline after CAT will not add 1 to the I value.

The correct method:

Copy codeThe Code is as follows :#! /Bin/bash
For X in 'ls */.*/.*'
Do echo $ x
While read line
Do
C = 'echo $ Line | awk-f' (''{print $1 }''
# Echo $ C
I = $ (I + $ C ))
Done <$ x
Echo
Done
Echo $ I