Hi guys,
I just got a question, need your help: letter case in SAS seems making difference, at least in the case of "if...(then)". Look at this example:
data _t_;
input ID Name$ bloodtype$ Weight;
if bloodtype='a';
cards;
3 kelly a 120
4 brown A 200
;
run;
the result has only 1 line (3 kelly a 120).
if I change 'a' to 'A', then I get another line (4 brown A 200).
both didn't give me a result of all 2 lines.
does this mean, in some cases, letter case matters?
thanks,
In your code case doesn't matter.
For variable values then it does matter.
This means you can do the following and it won't make a difference:
prOC MEAns data=SAShelP.ClasS;
ruN;
But when testing strings and comparison, then a variable value of 'a' is different than 'A'
if var1='a' then ...;
is different than
if var1='A' then..;
Solution, when making string comparisons, upcase or lowcase the strings before comparison.
if upcase(var1)='A' then..
In your code case doesn't matter.
For variable values then it does matter.
This means you can do the following and it won't make a difference:
prOC MEAns data=SAShelP.ClasS;
ruN;
But when testing strings and comparison, then a variable value of 'a' is different than 'A'
if var1='a' then ...;
is different than
if var1='A' then..;
Solution, when making string comparisons, upcase or lowcase the strings before comparison.
if upcase(var1)='A' then..
Good news: We've extended SAS Hackathon registration until Sept. 12, so you still have time to be part of our biggest event yet – our five-year anniversary!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Ready to level-up your skills? Choose your own adventure.