I want to extract only last two numeric values from a string variable in SAS - string

Question

I want to extract only last two numeric values from a string variable and assign it to a new variable. Firstly i have extracted all the numeric values from the string using the code below and assigned it to a new variable but i ultimately want to extract only the last two numeric values so is there any better way to do this.
UI_DUM = input(compress(Prod_Desc,,"kd"),best.);
And one more question is: how to assign a temp variable for doing some manupulation work in SAS?

Answer 1

Here is the code.
You are doing it right, to remove the characters and keeping only digits. The same is being done for variable "temp1"(in the below code).
In the second step, using the length function, to calculate the total length of the string which now contains only digits. In the third step using the substr function to extract the last two digits.
If you want to do it in one statement, "final" variable is the answer.
LENGTH Function - Returns the length of a non-blank character string, excluding
trailing blanks, and returns 1 for a blank character string
compress function with "kd" option - would keep only digits.
COMPRESS(<, chars><, modifiers>)
Modifier - specifies a character constant, variable, or expression in which each non-blank character modifies the action of the COMPRESS function. Blanks are ignored. The following characters can be used as modifiers.
d or D adds digits to the list of characters.
k or K keeps the characters in the list instead of removing them
substr function - Extracts a substring from an argument -
SUBSTR(string, position<,length>)
data _null_;
Test_string="ada13117a1w11da1286s";
temp1=compress(Test_string, , 'kd');
temp2=length(temp1);
temp3=substr(temp1,temp2-1,2);
final=substr(compress(Test_string, , 'kd'),length(compress(temp1))-1,2);
put _all_;
run;
Regarding the temp variable, there is no such one in SAS. Just use any variable name and use the drop statement in final dataset like below;
data test(drop = temp); /*Would work as the temp variable*/
temp= 2*balance;/*just for example*/
/*use the temp in further calculations*/
run;

Answer 2

A somewhat different take:
data want;
set have;
UI_DUM = input(compress(Prod_Desc,,"kd"),best.);
UI_DUM_last2 = mod(UI_DUM,100);
run;
You could do that all in one line of course as well. This uses the numeric modulo function to simply give you the last 2 digits (any number modulo 100 will return the final 2 digits).