IDENTIFICATION DIVISION.
PROGRAM-ID. NAME.
ENVIRONMENT DIVISION.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 TDATE   PIC X(10) VALUE "2023-060".
01 TDAY    PIC 9(2).
01 TDAYS   PIC 9(3).
01 TMONTH  PIC 9(2).
01 TYEAR   PIC 9(4).
01 REM1    PIC 9(2).
01 REM2    PIC 9(2).
01 REM3    PIC 9(2).
01 QOT     PIC 9(2).
01 CONT    PIC 9(2)  VALUE  1.
01 I       PIC 9(2).
01 J       PIC 9(2).
PROCEDURE DIVISION.
MOVE TDATE(6:3) TO TDAYS.
MOVE TDATE(1:4) TO TYEAR.
DIVIDE TYEAR BY 400 GIVING QOT REMAINDER REM1.
DIVIDE TYEAR BY 100 GIVING QOT REMAINDER REM2.
DIVIDE TYEAR BY 4   GIVING QOT REMAINDER REM3.
IF REM1 = 0
 ADD 1 TO J
ELSE IF REM2 NOT =0 AND REM3 = 0
 ADD 1 TO J
END-IF
END-IF.
PERFORM VARYING I FROM 1 BY 1 UNTIL CONT > I
IF TDAYS > 31 AND ( CONT = 1 OR 3 OR 5 OR 7 OR 8 OR 10 OR 12 )
SUBTRACT 31 FROM TDAYS
ADD  1 TO CONT
ELSE IF TDAYS > 28 AND CONT = 2
SUBTRACT 28 FROM TDAYS
ADD 1 TO CONT
ELSE IF TDAYS > 30 AND ( CONT = 4 OR 6 OR 9 OR 11 )
SUBTRACT 30 FROM TDAYS
ADD 1 TO CONT
END-IF
END-IF
END-IF
END-PERFORM.
MOVE TDAYS TO TDAY.
DISPLAY TDAYS.
DISPLAY "TODAY GREGORIAN DATE IS : "TDAY"-"CONT"-"TYEAR.
STOP RUN.

COBOL online compiler

Write, Run & Share COBOL code online using OneCompiler's COBOL online compiler for free. It’s a reliable and accessible playground to practice and run COBOL code with ease. The compiler supports classic COBOL syntax and is great for learning, teaching, and experimenting with business logic programs.

About COBOL

COBOL (Common Business-Oriented Language) is a high-level programming language developed in the 1950s. It is primarily used in business, finance, and administrative systems for companies and governments. COBOL is known for its English-like syntax and is still widely used in legacy enterprise systems.

Sample Code

The following is a simple COBOL program that prints a greeting:

IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO.
PROCEDURE DIVISION.
    DISPLAY "Hello, OneCompiler!".
    STOP RUN.

Taking inputs

In COBOL, input is typically handled using the ACCEPT keyword. Here’s an example that takes user input and prints it back.

IDENTIFICATION DIVISION.
PROGRAM-ID. GREET.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 USER-NAME PIC A(30).

PROCEDURE DIVISION.
    DISPLAY "Enter your name: ".
    ACCEPT USER-NAME.
    DISPLAY "Hello, " USER-NAME "!".
    STOP RUN.

Syntax Basics

Program Structure

COBOL programs are divided into four divisions:

  • IDENTIFICATION DIVISION: Program metadata
  • ENVIRONMENT DIVISION: Machine/environment details (optional)
  • DATA DIVISION: Variable declarations
  • PROCEDURE DIVISION: Actual program logic

Variables

Variables are declared in the DATA DIVISION using PIC clauses.

01 AGE        PIC 99.
01 NAME       PIC A(20).
01 SALARY     PIC 9(5)V99.

Displaying and Accepting Data

DISPLAY "Welcome to COBOL!".
ACCEPT USER-INPUT.

Conditional Statements

IF AGE >= 18
    DISPLAY "Eligible to vote."
ELSE
    DISPLAY "Not eligible."
END-IF.

Loops (PERFORM)

PERFORM VARYING I FROM 1 BY 1 UNTIL I > 5
    DISPLAY "Count: " I
END-PERFORM.

This guide provides a quick reference to COBOL programming syntax and features. Start coding in COBOL using OneCompiler’s COBOL online compiler today!