Cobol Cheat Sheets

Program Structure:

IDENTIFICATION DIVISION.
PROGRAM-ID. ProgramName.

DATA DIVISION.
WORKING-STORAGE SECTION.
01 VariableName PIC X(10).

PROCEDURE DIVISION.
    Display 'Hello, World!'.
    STOP RUN.

Data Types:

• Alphanumeric: PIC X(n) (e.g., PIC X(10) for a 10-character string).
• Numeric: PIC 9(n) (e.g., PIC 9(3) for a 3-digit number).

Data Division:

• File Definition:

FILE SECTION.
FD File-Name.
01 Record-Name.
    05 Field1 PIC X(10).
    05 Field2 PIC 9(3).

Working with Data:

• MOVE Statement:

MOVE 'Value' TO VariableName.

• ADD Statement:

ADD 10 TO NumVariable.

• SUBTRACT Statement:

SUBTRACT 5 FROM NumVariable.

Conditional Statements:

• IF Statement:

IF Condition
    Perform Some-Operation
END-IF.

• EVALUATE Statement:

EVALUATE Variable
    WHEN 1
        Perform Operation-1
    WHEN 2
        Perform Operation-2
    WHEN OTHER
        Perform Default-Operation
END-EVALUATE.

Loops:

• PERFORM UNTIL:

PERFORM UNTIL Condition
    Perform Some-Operation
END-PERFORM.

• PERFORM VARYING:

PERFORM VARYING Counter FROM 1 BY 1 UNTIL Counter > 10
    Perform Some-Operation
END-PERFORM.

Procedures:

• Paragraphs:

Some-Operation.
    Display 'Performing Some Operation'.
    ...

File Handling:

• OPEN, READ, CLOSE File:

OPEN INPUT File-Name.
READ File-Name INTO Record-Name.
CLOSE File-Name.

Display Output:

• DISPLAY Statement:

DISPLAY 'Hello, World!'.

Stop Execution:

• STOP RUN Statement:

STOP RUN.

This is a basic COBOL cheat sheet covering fundamental syntax and constructs. COBOL is known for its verbose syntax, and this cheat sheet provides a starting point for understanding its structure and commonly used statements.