hello friends,
I am having trouble with one thing in SAS. I have a huge data set and of course there are number of missing observations in the data set. I have been asked to find the "missing code" the data set is using. ? Well i understand the question, the missing data code can be ".", " " or "-99" or it can be anything. but how do i find what code the data set is using for missing values ? what program statemetn should i use to find out the missing code the data set is using  ?
Any help would be appreciated.

thanks.

Racheeta.