Radio Shack TRS-80 PC-3 Owner's Manual page 184

1 ASC string expression
ASC is a string function which returns the numeric ASCII code value of the first character in its argument. The chart of ASCII
codes and their relationship to characters is given in Appendix B, ASC "A" is 65.
1 CHR$ numeric expression
CH R$ is a string function which returns the character which corresponds to the numeric ASCII code of its argument. The chart
of ASCII codes and their relationship to characters is given in Appendix B. CHR$ 65 is "A".
1 LEFT$ (string expression, numeric expression)
LEFT$ is a string function which returns the leftmost part of the string first argument. The number of characters returned is
determined by the numeric expression. LEFT$ ("ABCDEF", 2) is "AB".
184