VF programming, known: S = 1 + 3 + 5 + 7 + 9 + The answer is 961

VF programming, known: S = 1 + 3 + 5 + 7 + 9 + The answer is 961

s=0
for i=1 to 1000 step 2
s=s+i
if s>1000
?s-i
exit
endif
endfor
return