Count how many days pass between two periods

is there a way to count how many days pass from a start-end to the next one? Let say:

   ID            Start            End    
 0001          22JAN2022       23JAN2022 
 0001          26JAN2022       30JAN2022          
 0001          03MAR2022       08MAR2022    
 0001          09MAR2022       15MAR2022    
 0001          17MAR2022       30MAR2022     

desired output:

   ID            Start            End           days 
 0001          22JAN2022       23JAN2022         3
 0001          26JAN2022       30JAN2022         4   
 0001          03FEB2022       08MAR2022         1
 0001          09MAR2022       15MAR2022         2
 0001          17MAR2022       30MAR2022      .......   

>Solution :

I believe I demonstrated this in another thread but there you go

data have;
input ID $ (Start End)(:date9.);
format Start End date9.;
datalines;
0001 22JAN2022 23JAN2022 
0001 26JAN2022 30JAN2022 
0001 03FEB2022 08MAR2022 
0001 09MAR2022 15MAR2022 
0001 17MAR2022 30MAR2022 
;

data want;
   set have;
   by ID;
   set have(firstobs = 2 rename = start = s keep = start)
       have(obs = 1 drop = _all_);
   if last.ID then s = .;
   days = s - end;
run;