z*********o
发帖数: 541 | 1 73. The following SAS program is submitted:
data work.test;
First = 'Ipswich, England';
City_Country = substr(First,1,7)!!', '!!'England';
run;
Which one of the following is the length of the variable CITY_COUNTRY in the
output data set?
A. 6
B. 7
C. 17
D. 25
Answer: D
为何答案是D呢？在SAS里面run了一下 结果是Ipswich,England.这样的话长度也不是25
呀？谢谢 | A*********u
发帖数: 8976 | 2 length of a variable指的是最长可以储存的长度
不是particular某一个值的长度
值还可以是missing呢
73. The following SAS program is submitted:
data work.test;
First = 'Ipswich, England';
City_Country = substr(First,1,7)!!', '!!'England';
run;
Which one of the following is the length of the variable CITY_COUNTRY in the
output data set?
A. 6
B. 7
C. 17
D. 25
Answer: D
为何答案是D呢？在SAS里面run了一下 结果是Ipswich,England.这样的话长度也不是25
呀？谢谢
【在 z*********o 的大作中提到】
: 73. The following SAS program is submitted:
: data work.test;
: First = 'Ipswich, England';
: City_Country = substr(First,1,7)!!', '!!'England';
: run;
: Which one of the following is the length of the variable CITY_COUNTRY in the
: output data set?
: A. 6
: B. 7
: C. 17
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