29.The following SASprogram is sumbitted:
data WORK.INFO;
infile 'DATAFILE.TXT';
input @1 Company $20. @25 State $2. @;
if State=' ' then input @30 Year;
else input @30 City Year;
input NumEmployees;
run;
How many raw datarecords are read during each iteration of the DATA step?
A. 1
B. 2
C. 3
D. 4
Answer: A
為什么是1呢?if語句后面沒有加@,那input NumEmployees這一句不就應(yīng)該是讀入下一行嗎?