COBOL

COBOL runs 70% of the world's business transactions. Modern COBOL (GnuCOBOL 3.2 / IBM Enterprise COBOL) supports JSON, XML, and Object-Oriented features.

When to Use

• Mainframes: The backbone of banking/insurance systems (CICS/IMS).
• Legacy Migration: Moving logic to Linux/Cloud using GnuCOBOL.
• Decimal Arithmetic: Native fixed-point math (PICTURE 9V99) is unmatched for currency.

Core Concepts

Divisions

IDENTIFICATION, ENVIRONMENT, DATA, PROCEDURE.

Picture Clause

01 SALARY PIC 9(5)V99. Defines data layout precisely.