A brief introduction the structure and syntax of COBOL programming delivered to http://www.uuasc.org/

1. UUASC, April 5,
2018
Bob
Reselman

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Brief Bio

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Brief Bio

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Thrice Weekly Cartoon on DevOps.com

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Alms
https://www.etsy.com/shop/3WLStore

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Agenda
● Background
● Getting the IDE
● My First Program
● My Real Program
● COBOL as a Structured Document
● Variable and Data Types
● Hierarchical Data
● Procedural Programming
● Comments, Questions and Answers

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https://devops.com/the-beauty-of-the-cobol-programming-language-
v2/
Article

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Special thanks to IBM!!

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Disclaimer

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Background
● Common Business Oriented Language
● Designed in 1959
● Compiled, and this matters
● Mostly Mainframes
● Runs over 70% of the world business transactions
● Yes, it is object oriented, classes and interfaces since 2002

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IDEhttps://opencobolide.readthedocs.io/en/latest/index.ht
ml

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My First Program

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My Real First Program

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My First Real Program
Demo

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COBOL’s Document Layout

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COBOL’s Document Hierarchy

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COBOL’s Document Hierarchy

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Symbol Description Example Declaration Sample Value
9 A numeric value where each
occurance of 9 represents a
digit
99 or 9(2) 35
a Alphabetic aaa or a(3) “Bob”
x Alphanumeric xxxx or x(4) “R2D2?”
v Implicit decimal* v(3) .175
s Sign s9(2) -76
p Assumed decimal* p9 .6
Data Types

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Hierarchical Data Structures

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COBOL is Procedural

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Demo of Procedural Code

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Comments, Questions and Answers