Hi all,   First time poster, long time forum user.  All the advice provided has been super helpful.  I am currently using SAS 9.3.   I am trying to analyze the number of symptoms individuals experienced but the types of symptoms are in different columns, for example:   Cough  Fatigue    Fever    Headache    Rash   Yes         Yes          No         Yes          No    No         Yes          No          No           No   Yes          No          No          No           Yes    No          No          No          No            No     I want to know how many symptoms each individual experienced, but I am having a hard time thinking of a way to count the number of times "yes" appears across these variables without creating many if/then statements and a new variable. Like: IF FATIG="Yes" AND FVR="No" AND HDCH="No" AND COUGH="No" AND RASH="No" THEN NUM_SXS=1; Is there an easier way to count the number of times "Yes" appears across the row?  I don't necessarily need there to be a new variable, although it would be helpful later down the line.   Cough  Fatigue    Fever    Headache    Rash  Num_Symptoms   Yes         Yes          No         Yes          No             3    No         Yes          No          No           No              1   Yes          No          No          No           Yes             2    No          No          No          No            No              0        Any help is greatly appreciated.   Thank you   ... View more