What is the ABAP debugger used for?

The ABAP debugger lets you pause a running ABAP program at a specific point and step through its execution line by line, inspecting variable values, the call stack, and internal table contents along the way — the standard tool for understanding why a program is behaving unexpectedly, rather than guessing from the final output alone.

//  entering debug mode via the command field:
/h
//  then execute the transaction/report as normal;
//  execution pauses at the first line, ready to step through

It's built directly into the SAP GUI and accessible for any ABAP program you have authorization to debug, making it one of the most commonly used tools for a beginner learning to understand how existing SAP programs actually work, not just for fixing bugs in new custom code.

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