Definition of Function
Function
Functions
are
mini-programs
or
a
block
of
code
that
are
reusable
anywhere
in
your
program.
A
function
performs
a
task,
and
once
it
is
defined
we
can
perform
the
task
by
calling
the
function
using
the
function
name.
In-Built Functions
Python
has
a
set
of
in-built
functions
that
are
already
defined
to
perform
a
certain
task.
The
python
interpreter
has
several
functions
that
are
always
present
for
use.
Eg.
print()
,
min()
,
max()
,
len()
,
etc.
User Defined Functions
Python
allows
us
to
define
and
use
our
own
custom
logic
inside
a
function.
Functions
that
we
define
ourselves
to
do
certain
specific
tasks
are
referred
to
as
user-defined
functions.
Calling a Function
Calling
(Using)
a
function
is
done
in
a
particular
way
in
Python.
We
just
write
the
name
of
the
function
followed
by
round
()
brackets
containing
the
arguments
.