an example can be found on AMOSPro_Examples:Examples/H-6/Help_69.AMOS
SETs the characters you want to INPUT to end a line of data. Many computers need both a [Return] and [line feed] character at the end of each line, but the Amiga only needs a [line feed]. Make the second value a negative number if you only want to use a single character.
Set Input 10,-1 : Rem Standard Amiga format Set Input 13,10 : Rem PC or ST compatible format