z/OS ISPF Dialog Tag Language Guide and Reference
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LEN

z/OS ISPF Dialog Tag Language Guide and Reference
SC19-3620-00

To perform a LEN check, specify the check item TYPE attribute as LEN. A LEN test allows you to validate the length of the variable. The PARM1 attribute can be a relational operator or a variable name that contains a relational operator. Valid relational operators are EQ, LT, GT, LE, GE, NE, NG, or NL. If a variable name is used, it must be preceded by a “%”. The PARM2 value can be either a number or a variable name that contains the number. If you enter a number, it must be in the range of 1-99999. If you use a variable name, it must be preceded by a “%”.

Here is an example where a LEN check in the chapters variable class validates the length of chapter names:
<!doctype dm system>

<varclass name=chapters type='CHAR 8'>
  <checkl msg=liba019>
     <checki type=len parm1=le parm2=8>
  </checkl>

The conversion utility generates a LEN verification statement in the )PROC section.

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