In this topic, we described about the Simple PERFORM with detailed example.
Simple perform used to execute the statements-block/procedures. Simple PERFORM was categorized to both in-line or out-of-line.In simple PERFORM, the statements-block/procedures executed only once and control passed to the next executable statement.
|In-line PERFORM||Out-of-line PERFORM|
procedure-name-1, procedure-name-2 -
Must name a section or paragraph in the procedure division. If one of the procedures is in a declarative procedure and both procedures are specified, the other procedure also must be procedure-names in the same declarative procedure.
If procedure-name-1 is specified, imperative-statement-1 and the END-PERFORM phrase must not be specified. If procedure-name-1 is omitted, imperative-statement-1 and the END-PERFORM phrase must be specified.
The statements-block to be executed for an in-line PERFORM. Whenever an out-of-line PERFORM statement is executed, control is transferred to the first statement of the procedure named procedure-name-1. Control is always returned to the statement following the PERFORM statement.
A simple program shows the Simple PERFORM coding in COBOL program.
The above example describes about outline simple PERFORM which will display student class based on inputs.