Statements And Sentences - Control Data Corporation 3300 Reference Manual

4.1.2
STATEMENTS
AND SENTENCES
60229400
The three types of statements correspond to the three sentence types:
imperative, conditional, and compiler directing. A semicolon, may be
used as a separator between statements or within the IF statement to make
a sentence more readable. A separator may not immediately follow another
separator.
An imperative statement indicates a specific action to be taken by the object
program. An imperative sentence is an imperative statement terminated by
a period followed by a space. An imperative statement may consist of a
sequence of imperative statements each separated optionally from the next
by a separator. Imperative verbs are the following:
ACCEPT DIVIDEt MOVE SET
ADDt EXAMINE MULTIPLyt SORT
ALTER EXIT OPEN
STOP
CLOSE GENERATE PERFORM SUBTRACTt
COMPUTEt GO RELEASE TERMINATE
DISPLAY INITIATE SEEK WRITEtt
In a statement format, the term, imperative-statement, refers to a sequence
of consecutive imperative statements ended by a period or an ELSE associated
with a previous IF verb or a WHEN associated with a previous SEARCH verb.
A conditional statement specifies a condition to be evaluated for truth, and
subsequent action of the object program is dependent on this truth value.
A conditional sentence is a conditional statement or sequence of conditional
statements optionally preceded by an imperative statement, terminated by a
period followed by a space. Conditional statements are the following:
IF
READ
SEARCH
RETURN
WRITE with INVALID KEY
Arithmetic statements with ON SIZE ERROR
A compiler directing statement consists of a compiler directing verb and its
operands. A compiler directing sentence is a single compiler directing
statement terminated by a period followed by a space. Compiler directing
verbs are the following:
COpy
ENTER
NOTE
tWithout the SIZE ERROR option
ttWithout the INVALID KEY option
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