data _null_;
s = "Amy,Jeff,Paul,Mary";
w2 = prxchange("s|^(.+?),(.+?),.*|$1+$2|",1,s);
put s= w2=;
run;
/* on log
s=Amy,Jeff,Paul,Mary w2=Amy+Jeff
*/
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Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
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