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filein

Filein is a term used in computing to denote input that is read from a file, typically as a directive, function, or language construct. It does not correspond to a single standardized feature across programming languages; instead, it arises as shorthand in documentation, tutorials, or domain-specific languages to refer to loading data from a file into a program.

In practice, file input involves opening a file, reading its contents, and supplying the data to the

Because filein is not a universal standard, its usage is context-dependent. Developers should consult the documentation

See also: file I/O, standard input, input stream, encoding.

program,
often
with
options
for
buffering,
encoding,
and
error
handling.
The
exact
syntax
and
behavior
of
a
feature
labeled
filein
vary
by
language
and
tool.
In
some
environments,
a
dedicated
filein
command
or
directive
may
read
the
entire
file
into
memory
as
a
string
or
as
a
sequence
of
records.
In
others,
file
input
is
performed
through
standard
file
I/O
primitives
(open,
read,
readline)
or
via
higher-level
abstractions
such
as
input
streams
or
readers.
of
the
specific
language
or
tool
to
understand
how
file
input
is
implemented,
how
it
handles
errors,
character
encoding,
and
file
permissions,
and
how
it
interacts
with
other
I/O
facilities
such
as
standard
input
or
file
output.