[#BloombergLP-bdlt-Timetable-begin]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Timetable.adoc[Timetable]::begin
:relfileprefix: ../../../
:mrdocs:

Return an iterator referring to the first transition in this timetable, or the past&hyphen;the&hyphen;end iterator if this timetable is empty&period; The iterator remains valid as long as this timetable exists, and the number of transitions within this timetable does not change&period;

== Synopsis

Declared in `&lt;bdlt&lowbar;timetable&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlt/Timetable/const_iterator.adoc[const&lowbar;iterator]
begin() const;
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