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Note:

  CAT - concatenates character strings without removing leading or trailing blanks
CATS - concatenates character strings and removes leading and trailing blanks
CATT - concatenates character strings and removes trailing blanks
CATX - concatenates character strings, removes leading and trailing blanks, and inserts separators

In previous versions of SAS you would have to use a combination of the LEFT, and/or the TRIM functions along with the double concatenation bars (||). If you wanted a separator, you would have to include that inside quotes.

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

data test;
  input (x1-x4) ($); 
  x5=' 5';
  length new1 $40 new2-new4 $10 ; 
  new1=cat(of x1-x5);
  new2=cats(of x1-x5);
  new3=catt(x1,x2,x3,x4,x5);
  new4=catx(',', of x1-x5);
  keep new:;
datalines;
1 2 3 4
5 6 . 8
;

proc print;
run;

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

Obs                   new1                   new2      new3       new4

 1     1       2       3       4        5    12345    1234 5    1,2,3,4,5
 2     5       6               8        5    5685     568 5     5,6,8,5

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