Progress
Language Reference
+ Concatenation Operator
Produces a character value by joining two character strings or expressions.
SYNTAX
expression
An expression whose value is a character string.
EXAMPLEThis procedure prints mailing labels. It uses the concatenation operator (+) to ensure that the third line of each label shows the city and state separated by a comma and a space. The FORMAT x(16) is specified to provide room for up to 16 characters in the result of the concatenation. If a FORMAT is not given, then Progress only displays the first eight characters of the result since x(8) is the default format for a character expression.
This is a label produced by this procedure.
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NOTE
If any of the string values you concatenate is unknown, then the result is the unknown value (?). This might lead to unexpected results if a field used in an expression is not mandatory. For example, you might have fields for a person’s first name, last name, and middle initial. You might combine these into a full name with an expression like the following.
If minit is not a mandatory field, then in some records minit set to the unknown value (?). If so, these records are displayed as the unknown value. You can avoid this by using conditional code.
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