EXTENT function

This function returns the extent of an array field or variable as an INTEGER value. More specifically, it returns:

The constant or variable extent value for a field or variable defined as a determinate array

The Unknown value (?) for a field or variable defined as an unfixed indeterminate array

The extent for a field or variable defined as a fixed indeterminate array

Zero for a field or variable that is not an array

Note:

The EXTENT function corresponds to the EXTENT attribute.

Syntax 

 

EXTENT ( array )

array

Any array field or variable.

Example 

In the following example, the EXTENT function is used to set the limit of a DO loop that cycles through all elements of an array:

 

r-arrext.p

DEFINE VARIABLE int_value AS INTEGER NO-UNDO EXTENT 3 INITIAL [1, 2, 3]. DEFINE VARIABLE ix        AS INTEGER NO-UNDO . DEFINE VARIABLE tot     AS INTEGER NO-UNDO LABEL "The total is".   DO ix = 1 TO EXTENT(int_value):   tot = tot + int_value[ix]. END.   DISPLAY tot.

See also 

DEFINE VARIABLE statement, ENTRY function, EXTENT attribute, EXTENT statement