[#absl-Nanoseconds-0a]
= xref:absl.adoc[absl]::Nanoseconds
:relfileprefix: ../
:mrdocs:

Constructs a `Duration` from an integral number of nanoseconds.

== Synopsis

Declared in `<absl/time/time.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename T,
    /* implementation-defined */ = 0>
constexpr
xref:absl/Duration.adoc[Duration]
Nanoseconds(T n);
----

== Description

Factory functions for constructing `Duration` values from an integral number of the unit indicated by the factory function's name. The number must be representable as int64_t.

NOTE: no "Days()" factory function exists because "a day" is ambiguous. Civil days are not always 24 hours long, and a 24‐hour duration often does not correspond with a civil day. If a 24‐hour duration is needed, use `absl::Hours(24)`. If you actually want a civil day, use absl::CivilDay from civil_time.h.

Example:

absl::Duration a = absl::Seconds(60); absl::Duration b = absl::Minutes(1); // b == a

== Return Value

A duration of `n` nanoseconds.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *n*
| The number of nanoseconds.
|===


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