I am trying to find differences between two files. I know I can use diff or cmp command but I a looking for results to be useful or descriptive.

In sense, I am looking for differences where line number, position_from to position_to, and string_value is mentioned for both files.

Pls help me in the code / script.

Did you try the "-e" option from diff?

File1: a.txt

$ cat a.txt
ABC|1|11|3333|dog
ABC|1|11|3333|dig
ABC|1|11|3633|dug
ABC|2|11|3333|cat

File2: b.txt

$ cat b.txt
ABC|1|12|3333|dog
ABC|1|11|3333|dig
ABC|7|11|3633|dag
ABC|2|11|3373|cat

I want to find differences where the line is listed, position from to is listed and the string value is listed between the two files where the difference occurs.

I tried your approach, and it gives me differences by lines but imagine if there are 100 delimited columns in a line, how would one find what value(s) are differing. In above two text files, in line 3 there are two differences. The result set does not give both differences but rather stating line number as a difference.

$ diff -e a.txt b.txt
3,4c
ABC|7|11|3633|dag
ABC|2|11|3373|cat
.
1c
ABC|1|12|3333|dog
.