A character expression consists of a character operator (//) that concatenates two operands of type character. The evaluation of a character expression produces a single value of that type.
The result of a character expression is a character string whose
value is the value of the left character operand concatenated to the
value of the right operand. The length of a character expression is
the sum of the lengths of the values of the operands. For example,
the value of the character expression 'AB'//'CDE' is
'ABCDE', which has a length of five.
Parentheses do not affect the evaluation of a character expression; for example, the following character expressions are equivalent:
('ABC'//'DE')//'F'
'ABC'//('DE'//'F')
'ABC'//'DE'//'F'
Each of these expressions has the value '
ABCDEF'.
If a character operand in a character expression contains blanks,
the blanks are included in the value of the character expression.
For example, 'ABC '//'D E'//'F ' has a value of
'ABC D EF '.