trim
mean
today
intck
scan

1.Compress is one of the sas function which is used to 
remove spaces in string value and concatenate two values 
with out spaces.

2.Input is another function of sas, it is one of conversion 
function in sas. It converts numeric into char.

3.Put is another conversion function in sas. It converts 
char to numeric.

SAS functions can be used to convert data and manipulate
character variable values.
different types of functions:1)TRIM
                             2)SUBSTR
                             3)ABS
                             4)SCAN

TRIM:Removing the trailing blanks from character expressions.
               syntax=trim(argument)
substr:extracts the substring from an argument
               syntax=substr(argument,position<,n>)
abs=returns the absolute of the argument
                syntax=abs(argument)