The following SAS program is submitted:
data WORK.PRODUCTS;
Prod=1;
do while(Prod LE 6);
Prod + 1;
end;
run;
What is the value of the variable Prod in the output data set?
A. 6
B. 7
C. 8
D. . (missing numeric)
Answer: B
注解：DO WHILE为循环语句，重复执行该statement和END之间的语句，直到括号内的表达式为False为止。本题中，当Prod的值为6时，执行最后一次Prod + 1，所以程序结束时Prod的值为7。