AIPS HELP file for TO in 31DEC13
As of Tue May 21 6:46:54 2013
Use: In the FOR loop construction TO is used to seperate
the starting value for the incrementing variable
from the limiting value. (See FOR).
Grammar: FOR variable = start TO fini BY increment
statement1; statement2;... ; END
where 'variable' is a scalar variable that will
change each time through the loop, beginning at
'start', have 'increment' added to it each time
through the loop (the increment may be positive
or negative) and will end when the loop has been
executed with 'variable' greater than or equal to
'fini'. Note that this implies that the loop
will be executed at least once no matter what the
start, fini and increment parameters are.
If the BY section is omitted, the increment
will default to 1. Statementi are AIPS statements.
Examples: FOR I = 1 TO 10; SUM = SUM + A(I); END
FOR I = K+3 TO K BY -1; A(I+1) = A(I); END
In the first example SUM will be incremented by the
sum of the first 10 elements in array A.
The second example will shift the section of array
A between A(K) and A(K+3) forward 1 element.