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# Introduction
## Scope
Debugger is a graphical user interface for the Erlang interpreter, which can be
used for debugging and testing of Erlang programs. For example, breakpoints can
be set, code can be single-stepped, and variable values can be displayed and
changed.
Debugger can also be accessed through the interface module `m:int`.
## Prerequisites
It is assumed that the reader is familiar with the Erlang programming language.
Modules to be debugged must include debug information, for example,
`erlc +debug_info MODULE.erl`.
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