System Functions

KEF( )

Return First Key of File

Format

KEF(chan[,fileopt])
 
Where: 

chan

Channel or logical file number of the file to reference.

fileopt

Supported file options (see File Options):

END=stmtref

End-of-File transfer

ERR=stmtref

Error transfer

KNO=num | string$

File access key number (num) or name (string$)

stmtref

Program line number or statement label to which to transfer control.

Returns

Key of first record in file.

Description

The KEF( ) function returns the key of the first record in the file specified. The result is based on the:

The KEF( ) function can also be used in TCP (Transmission Control Protocol) to identify local sockets.

See Also

File Handling

Example

open (1) "CUSTNO"
......
F$=kef(1),L$=kel(1)
print "Customers range from ",F$,"->",L$
......
end