88. Given the following DATA step:
data loop;
x = 0;
do index = 1 to 5 by 2;
x = index ;
end;
run;
Upon completion of execution, what are the values of the variables X and INDEX in the
SAS data set named
LOOP?
A. x = 3, index = 5
B. x = 5, index = 5
C. x = 5, index = 6
D. x = 5, index = 7
Answer: D

个人认为B对，所以实在想不明白为什么index会等于7.
请会的朋友解答一下。谢谢！