Error Messages And Debugging - Casio FX-730P Owner's Manual

4-6 Error Messages and Debugging
An error in a program is called a "bug", and tracing and correcting this error is
called "debugging".
Debugging can be carried out easily in the computer since it is provided with an
automatic check mechanism that displays an error message if there is an error in
program execution or in the grammar of the BASIC language. It is important to
trace bugs persistently since there may be certain cases when a bug does not
become an actual error but the desired results cannot be obtained.
1. Debugging with the Error Message
With the display as shown below, the error message reveals the type of the error,
the program area and the line number where the error occurred.
Type of error
_ _ j '
L
L Line number where the error occurred
Program area where the error occurred
The Error 2 display is called an "error code" and indicates the type of error. The
various error codes are shown in the following list together with causes and
countermeasures (debugging methods).
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