The L code verifies data based on its length and produces no output if the test fails.
Format
|
Ln [,m] |
Parameter(s)
|
n |
Specifies a maximum length of n characters. |
|
n,m |
Specifies a range of from n to m characters. |
Description
Data either exceeding n characters or falling outside the range of n–m produces a null value. If n is zero, the length of the value is returned.
For example, assume that the (unformatted) price of a book in the BOOK-CATALOG file must be at least one character and no greater than three characters in length. The following L correlative verifies the data in the attribute PRICE before including it in a report:
|
L1 , 3 |
Parameter(s)
|
One (1) |
Specifies that the value must contain at least one character. |
|
3 |
Specifies that the value should be no longer than three characters. |
See Also