The sytax is the first and last values separated by a colon (you gotta love the colon it does so much for us). Here the array x will range from 10 to 15.
[pre]array x{6} _temporary_ (10:15);[/pre]
The following step augments this definition by passing through a list of values twice.
[pre]data silly;
array x{10} _temporary_ (2*1:5);
do i = 1 to dim(x);
y= x{i};
put i= y= ;
end;
run;
[/pre]