Tandy 1000 Basic Reference Manual page 199

Chapter 10 I
BASIC
Keywords
LEN
Function
LEN(string)
Returns the number of characters in string. Blanks are counted.
Examples
X
=
L E N < S E N T E N C E S )
gets the length of SENTENCE$ and stores it in X.
P R I N T L E N ( " C A M B R 1 D G E " )
+
L E N < " B E R K E L E Y " )
prints 17.
P R I N T L E N ( " O R L A N D 0 , F L O R I D A " )
prints 16.
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