Correcting Your Program

If you cannot understand why your program is giving wrong results, you can:

You will gradually learn which of these techniques suits you better.

Modifying Your Program

You can put extra instructions into your program, such as:

  ...
say "Checkpoint A.  x =" x
  ...
say "End of first routine"
  ...

Tracing Your Program

Or you can use the TRACE instruction, described on page TRACE.