The BBC and Master Computer Public Domain Library

AE11 LEN

Submitted by Steve Fewell

Description:

Call the Evaluate value routine (&AD36) which will evaluate the next value at BASIC text
pointer B location, or the expression at that location if the value begins with an open bracket ("(").
If the value obtained is not a String (A isn't 0) then issue a Type mismatch error, as the LENgth
can only be obtained for a string value.

Set A to the value in &36 (The SWA length).
Continue to routine &AE18 to set the IWA to the 8-bit value contained in A and exit.

Disassembly for the LEN routine