System Functions
LRC( ) Longitudinal-Redundancy Check
 
Format LRC(string$[,ERR=stmtref])
 
Where:
 
string$ Character string whose longitudinal redundancy checksum is to be calculated.
 
stmtref Program line number or statement label to which to transfer control.
 
Returns One-byte string, longitudinal checksum.


*Note* The LRC( ) function is used primarily in conjunction with synchronous communications.


 
Description The LRC( ) function returns the longitudinal redundancy checksum of a character string. The longitudinal redundancy check of a character string is a one byte string resulting from a logical XOR( ) comparison of all the characters in the string.
 
Examples A$=HTA(LRC($0102$)) ! yields hex 03
A$=HTA(LRC($0305$)) ! yields hex 06