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Mainframe Development
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Mainframe Development

A brief introduction of  divisions is given below −
Sections are the logical subdivision of program logic. A section is a collection of paragraphs.
Paragraphs are the subdivision of a section or division. It is either a user-defined or a predefined name followed by a period, and consists of zero or more sentences/entries.
Sentences are the combination of one or more statements. Sentences appear only in the Procedure division. A sentence must end with a period.
Statements are meaningful COBOL statements that perform some processing.
Characters are the lowest in the hierarchy and cannot be divisible.

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Cobol Program Structure

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There are many Free Mainframe Emulators available for Windows which can be used to write and learn simple COBOL programs. One such emulator is Hercules.

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List of COBOL Compilers:
IBM COBOL
NetCOBOL
GnuCOBOL
Visual COBOL
MCP

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Importance of COBOL : COBOL was the first widely used high-level programming language. It is an English-like language which is user friendly. All the instructions can be coded in simple English words. COBOL is also used as a self-documenting language. COBOL can handle huge data processing. COBOL is compatible with its previous versions. COBOL has effective error messages and so, resolution of bugs is easier.

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What is Cobol? COBOL is a high-level language. One must understand the way COBOL works. Computers only understand machine code, a binary stream of 0s and 1s. COBOL code must be converted into machine code using a compiler. Run the program source through a compiler. The compiler first checks for any syntax errors and then converts it into machine language. The compiler creates an output file which is known as load module. This output file contains executable code in the form of 0s and 1s.

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Modules in Mainframe 1) JCL - Job Control Language 2) COBOL - Common Business Oriented Language 3) VSAM - Virtual Storage Access method 4) CICS - Customer Information Control System 5) DB2 - Database 6) IMS DB/DC - Information Management System Database/Data Capture

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What is mainframe development? Page will include all details regarding VSAM, CICS, DB2, JCL and COBOL.

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