Ø COBOL is like an English language. Ø Character is the lowest component. Ø Word is made up of one or more characters. Ø Cla...
Ø COBOL is like an English
language.
Ø Character is the lowest
component.
Ø Word is made up of one or
more characters.
Ø Clause consists of word and
characters. It specifies an attribute for an entry
Ø Statement is syntactically
valid combination of words and clauses
Ø
Sentence is a sequence of one or more statements terminated
by period
Ø Paragraph consists of one
or more sentences
Ø Section consists of one or
more paragraphs
Ø Division consists of one or
more paragraphs or sections
Ø Program is made up of
divisions
COBOL CHARACTER SET
Set of
51 characters
COBOL WORDS
User
defined words
Ø Words declared by programmer to coin identifiers,
paragraph names, file names and section names.
Reserved
words
Ø Words that are having specific meaning to the
compiler.
COBOL CODING FORM
Columns
1-
6 Sequence numbers identifying pages
or lines of a program
7 Continuation, comment or starting of a
new page
8 - 72
COBOL program statements
73-80 Remarks
/ (slash) forces page break
when printing source listing
- (dash) to indicate
continuation of nonnumeric literal
Ø
Columns 8-72 divided into two areas
Area A - columns 8 to 11
Area B - columns 12 to 72
Division, section and paragraph-names must all begin in Area A and end
with a period.
DIVISIONS OF COBOL
Every COBOL program contains up to four separate
divisions in the following order:
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