10.2.2 DO Loop Markings

DO loops are graphically displayed in a column headed DO Loops. Brackets mark the extent of each DO loop (up to nest level 10), as shown in the following example:

DO Loops     Line
 +---------  5  DO 99  I = 1,1000
 *           6    A(I,1) = B(1)
 *+--------  7    DO 95 J = 2,1000
 *!          8       A(I,J) = B(J)*A(I,J-1)
 *!________  9    95 CONTINUE
 *_________  10   99  CONTINUE

A statement that is enclosed by n DO loops has n exclamation marks (!) on that line. Loops that have been optimized in a major way have asterisks (*) instead of exclamation points in the source listing.

Note

KAP recognizes certain operations, such as matrix multiplication, as basic entities. Frequently, the loops forming such operations will not be marked.

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