Using Actuate BIRT Viewers : Functions and operators : TRIM( )
 
TRIM( )
Removes the leading and trailing blanks from a specified string. TRIM( ) does not remove blank characters between words.
Syntax
TRIM(str)
Argument
str
The string from which to remove leading and trailing blank characters.
Returns
A string with all leading and trailing blank characters removed.
Example
The following example uses TRIM( ) to remove all leading and trailing blank characters from values in the FirstName and LastName data fields. The expression uses the & operator to concatenate each trimmed FirstName value with a space, then with each trimmed LastName value.
TRIM([FirstName]) & " " & TRIM([LastName])