Radio Shack TRS-80 PC-3 Owner's Manual page 185

1 LEN
string expression
LEN
is a string function which returns the length of the string argument. LEN "ABCDEF" is 6.
1
MID$ (string expression, num. expo
1
,num. expo 2
M10$ is a string function which returns a middle portion of the string first argument. The first numeric argument indicates the
first character position to be included in the result. The second numeric argument indicates the number of characters that are
to be included. MID$ ("ABCDEF", 2,3) is "BCD".
1 RIGHT$ string expression, numeric expression
RIGHT$ is a string function which returns the rightmost part of the string first argument. The number of characters returned
is determined by the numeric argument. R IGHT$ ("ABCDEF", 3) is "DEF".
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