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If we want to write a sequence of records in a file , we use the Output mode. Input Mode – This mode is used for reading data from an input file. Input-Output Mode – This mode is used for both reading of data from an input file and writing of records or data in a file.

The primary use of line sequential files (which are also known as "text files" or "ASCII files") is for display-only data. Most PC editors, for example Notepad, produce line sequential files. In a line sequential file, each record in the file is separated from the next by a record delimiter.

Write statement can be used with FROM option to directly write records from the working storage variables. From is an optional clause. If the access mode is sequential, then to write a record, the file must open in Output mode or Extend mode.

FILE ALLOCATION : Step 1 of File Handling Files which we want to use in our program should be declared in FILE-CONTROL paragraph of INPUT-OUTPUT SECTION under ENVIRONMENT DIVISION. All files used in program must be specified in FILE-CONTROL paragraph. Each file must be specified using separate SELECT statement.

To declare an external file, you need to use the EXTERNAL clause in the FD statement. Input file: An input file is a file that is used to input data into the COBOL program. To declare an input file, you need to use the INPUT clause in the FD statement.

Line sequential. Line Sequential files are a special type of sequential file. They correspond to simple text files as produced by the standard editor provided with your operating system. Record sequential. Sequential files are the simplest form of COBOL file.

COBOL - File Definition. The FILE SECTION must contain a level-indicator for each input and output file. For all files except sort or merge files, the FILE SECTION must contain an FD entry. For each sort or merge file, the FILE SECTION must contain an SD entry.

Sequential File Organization Records can be read in sequential order. For reading the 10th record, all the previous 9 records should be read. Records are written in sequential order. A new record cannot be inserted in between.

If we want to write a sequence of records in a file , we use the Output mode. Input Mode – This mode is used for reading data from an input file. Input-Output Mode – This mode is used for both reading of data from an input file and writing of records or data in a file.

The primary use of line sequential files (which are also known as "text files" or "ASCII files") is for display-only data. Most PC editors, for example Notepad, produce line sequential files. In a line sequential file, each record in the file is separated from the next by a record delimiter.

Write statement can be used with FROM option to directly write records from the working storage variables. From is an optional clause. If the access mode is sequential, then to write a record, the file must open in Output mode or Extend mode.

FILE ALLOCATION : Step 1 of File Handling Files which we want to use in our program should be declared in FILE-CONTROL paragraph of INPUT-OUTPUT SECTION under ENVIRONMENT DIVISION. All files used in program must be specified in FILE-CONTROL paragraph. Each file must be specified using separate SELECT statement.

To declare an external file, you need to use the EXTERNAL clause in the FD statement. Input file: An input file is a file that is used to input data into the COBOL program. To declare an input file, you need to use the INPUT clause in the FD statement.

Line sequential. Line Sequential files are a special type of sequential file. They correspond to simple text files as produced by the standard editor provided with your operating system. Record sequential. Sequential files are the simplest form of COBOL file.

COBOL - File Definition. The FILE SECTION must contain a level-indicator for each input and output file. For all files except sort or merge files, the FILE SECTION must contain an FD entry. For each sort or merge file, the FILE SECTION must contain an SD entry.

Sequential File Organization Records can be read in sequential order. For reading the 10th record, all the previous 9 records should be read. Records are written in sequential order. A new record cannot be inserted in between.