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FOCAL (programming language)
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==Error codes== Since the interpreter lacked sufficient memory space to store error messages, or even a table of error numbers, FOCAL used a workaround by reporting the address of the error-detecting code as a fixed-point number. For example, the [[division by zero]] error was detected it would report {{code|?28.73 @ 01.10}}, where 28.73 represents the code checking for this error at memory page 28 plus an offset of 73 words, and 01.10 is the line number where the error occurred. Pages in the PDP-8 were 128 bytes long, so this address translates to location 3657.
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