Overlapping format values

[Batman]

I tried searching for an answer on this topic but couldn't find a definitive answer.  Shouldn't the following code generate an error message?   The groupings overlap.   How would SAS decide where to put a value of "2" based on these groupings?

26 proc format;

27

27 ! value test

28 1-2='1-2'

29 2-3='2-3'

30 ;

NOTE: Format TEST has been output.

31 run;

NOTE: PROCEDURE FORMAT used (Total process time):

real time 0.05 seconds

cpu time 0.03 seconds

[Reeza · Accepted solution]

No it won't generate an error and it won't assign multiples, it uses the first instance or assume that's it's included. 

You can control the boundaries using < to explicitly include or exclude.

http://support.sas.com/documentation/cdl/en/proc/70377/HTML/default/viewer.htm#n03qskwoints2an1ispy5...

proc format;
value test
1-<2 = '1-2'
2-3 = '2-3';
run;

data sample;
do i=1 to 4;
format i test.;
output;
end;
run;