COBOL Linkage section top clauses of External, Global, and Value explained if you can use or not.
Here’s sample COBOL logic where it tells you how to initialize the Comp variable before they move to numeric.
Explained the key differences between Sequential and Relative files.
How to use comp-5 data type in COBOL explained. Why it does not support decimals also explained with examples.
How to find Value clause and Unstring clause errors in COBOL. Explained with examples when you will notice these errors during compilation or execution time.
Examples for COBOL Evaluate statement for multiple conditions.
In COBOL, Variable-length records stores only in VB or Dynamic arrays. The given sample VB-array logic useful to code in your project.
GO TO statement really not required in COBOL. You can avoid using alternative methods. Read more to improve performance of your program.
COBOL multi dimensional arrays how to use in your program
Indexed file is not the same as sorted file. In COBOL this is tricky concept. Read more.
COBOL assumed decimal and dot difference given in this post. A useful answer to your project and interviews as well.
Simple COBOL search example useful to use in your projects.