[#BloombergLP-bsls-AssertTestException-lineNumber]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::xref:BloombergLP/bsls/AssertTestException.adoc[AssertTestException]::lineNumber
:relfileprefix: ../../../
:mrdocs:

Return the number of the line within the file `filename` containing the assertion that failed.

== Synopsis

Declared in `<bsls_asserttestexception.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
lineNumber() const;
----


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