User Guide : Using Content Extraction Language : Language Syntax and Examples : Chr (n)
 
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Chr (n)
This built-in function returns a one-character string of the ASCII character corresponding to an ANSI code. The argument n is any valid integer expression with a value between 0 (zero) and 255.
Example
#To remove quotation marks within a field of data in the source file named
#FIELDNAME, write the following expression:
GSub(Chr(034), "", FIELDNAME)
In this example Chr(034) represents quotation marks.