Do loop Question

[JKim8069]

11.4 In the data set Work.Invest, what would be the stored value for Year?
data work.invest;
do year=1990 to 2004;
Capital+5000;
capital+(capital*.10);
end;
run;
a. missing
b. 1990
c. 2004
d. 2005
Correct answer: d
At the end of the 15th iteration of the DO loop, the value for Year is incremented to 2005

Dear guys, can I know why it’s not 2004?

[mkeintz · Accepted solution]

The index variable (YEAR in your example) is incremented by 1 at the end of each iteration.  The looping will not stop until the index variable is outside of the range (1990 through 2004 in your example).

So, in the last iteration YEAR=2004, a valid value.  At the end of that iteration, it is incremented to 2005, at which point the index variable first becomes outside of range., and no more loops are executed.