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Enumerate

Enumerate is a verb meaning to name elements of a set one by one or to count them off in order. In writing, an enumerated list presents items in a sequential, numbered form. The noun enumeration refers to the act of listing or the resulting sequence. The word comes from Latin enumerare, meaning to recount or add up.

In mathematics and computer science, enumerable (or countable) describes sets that can be listed in a sequence.

In programming, enumerate commonly refers to a function that pairs each element of a sequence with its

A
finite
set
is
enumerable,
and
an
infinite
set
is
enumerable
if
its
elements
can
be
put
into
a
one-to-one
correspondence
with
the
natural
numbers.
Common
examples
are
the
natural
numbers;
the
set
of
rational
numbers
is
also
enumerable,
while
many
real
numbers
are
not,
depending
on
the
chosen
notion
of
enumeration.
index.
In
Python,
enumerate(iterable,
start=0)
yields
pairs
(index,
value)
as
you
iterate.
Separately,
enum
or
enumeration
type
refers
to
a
data
type
that
defines
a
fixed
set
of
named
constants,
used
to
improve
readability
and
maintain
type
safety
in
languages
such
as
C,
Java,
and
Rust.
The
term
also
appears
in
the
broader
sense
of
producing
a
list
of
items
programmatically.