COBOL Manual for TNS/E Programs (H06.03+)

Procedure Division
HP COBOL Manual for TNS/E Programs—520347-003
8-69
Concatenation Expressions
•
When the sequence of evaluation is not completely specified by parentheses, the
order of evaluation of consecutive operations of the same hierarchical level is from
left to right.
Using this order of evaluation, once a truth value for an entire complex condition is
established, evaluation of the condition ceases. For example, in the complex condition
A NOT < 1 AND A NOT > 10 AND B (A) > 5
no attempt is made to fetch B(A) if A is not a valid subscript, because determination
that the first condition is FALSE guarantees that the complete complex condition is
FALSE.
Concatenation Expressions
The value of a concatenation expression is the concatenation of the value of its
operands. It is the equivalent of a literal of the same class and value, and can be used
anywhere that a literal of that class can be used, except in a COPY or REPLACE
statement.
literal-1
is either a simple nonnumeric literal, a hexadecimal nonnumeric literal, or a
national literal. For information about these literals, see:
•
Simple Nonnumeric Literals
•
Hexadecimal Nonnumeric Literals
•
National Literals
literal-2
is either a simple nonnumeric literal, a hexadecimal nonnumeric literal, or a
national literal of the same class (alphanumeric or national) as literal-1.
figurative-constant
is a figurative constant that does not include the word ALL. For information about
figurative constants, see Figurative Constants.
concatenation-expr
is a concatenation expression of the same class (alphanumeric or national) as
literal-1.
literal-1
figurative-constant
&
literal-2
figurative-constant
concatenation-expr
VST801.vsd