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LENV returns the actual length of an AnV field or the size of an An field.
LENV(source_string, output)
where:
Alphanumeric of type An or AnV
Is the source string or field. If it is an An format field, the function returns its size, n. For a character string enclosed in quotation marks or a variable, the size of the string or variable is returned. For a field of AnV format, its length, taken from the length-in-bytes of the field, is returned.
Integer
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