Valid COBOL statements for line-sequential files

The following table shows the possible combinations of input-output statements for line-sequential files. 'X' indicates that the statement can be used with the open mode shown at the top of the column.

Table 1. Valid COBOL statements for line-sequential files
Access mode COBOL statement OPEN INPUT OPEN OUTPUT OPEN I-O OPEN EXTEND
Sequential OPEN X X   X
WRITE   X   X
START        
READ X      
REWRITE        
DELETE        
CLOSE X X   X