Code:
loop:
    FOR letters = STRING[0] to STRING[9]
     SEROUT PORTC.6,T9600,["string is ",(LETTERS),13,10]
     PAUSE 500
    NEXT letters
    GOTO loop
I found it's a weird way... and a bit obscure...i would used
Code:
loop:
    FOR letters = 0 to 9
     SEROUT PORTC.6,T9600,["string is ",STRING[LETTERS],13,10]
     PAUSE 500
    NEXT letters
    GOTO loop
seems more valuable no?