PERFORM statement
The PERFORM statement transfers control explicitly to one or more procedures and
implicitly returns control to the next executable statement after execution of the specified
procedures is completed. 
The PERFORM statement is also used to control execution of
one or more imperative statements that are within the scope of that PERFORM
statement.
- procedure-name-1 , procedure-name-2
- Must name a section or paragraph in the procedure division.
When both procedure-name-1 and procedure-name-2 are specified, if either is a procedure-name in a declarative procedure, both 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.
- imperative-statement-1
- The statements to be executed for an in-line PERFORM
Inline and out-of-line PERFORM statements
The PERFORM statement is an inline PERFORM statement, when procedure-name-1 is omitted.
The PERFORM statement is an out-of-line PERFORM statement, when procedure-name-1 is specified.
An inline PERFORM must be delimited by the END-PERFORM phrase.
The inline and out-of-line formats cannot be combined. For example, if procedure-name-1 is specified, imperative statements and the END-PERFORM phrase must not be specified.
You can use the EXIT PERFORM statement to exit from an inline PERFORM without using a GO TO statement or a PERFORM ... THROUGH statement. For details, see Format 5 (inline-perform).
You can use the INLINE directive to decide whether a procedure referenced by PERFORM statements is eligible for inlining. For details, see INLINE.
END-PERFORM
Delimits the scope of the in-line PERFORM statement. Execution of an in-line PERFORM is completed after the last statement contained within it has been executed.