Chapter 4-5: The Appx ILF Debugger |
Single Step
This option allows you to 'step through' the routine one statement at a time by executing the current line (which is highlighted). The logic of the current statement executes. The data values change to reflect the result of executing the current statement. The cursor moves to the next logical line in the routine, and it becomes the new current line (and is highlighted). One important thing to note about Return is that the next statement is the next executable statement, not necessarily the next sequential statement. For example, in the following routine:
IF TAR WORK AVAILABLE CREDIT LT 0 If the IF statement in this example encounters a false condition and sets the first true/false status indicator to F, the WARNING statement is not executed. By using Return to single-step, the debugger skips from the IF statement directly to the DISPLAY statement. Additionally, using Return at a COPY or GOSUB statement takes you to the first executable statement immediately following the COPY or GOSUB statement, allowing you to skip over the statements in the subroutine. |
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Single Step [RETURN] - Execute the current line and stop on the next line in the current routine.