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0yz

0yz is a short alphanumeric string that has no intrinsic meaning in itself. In reference works and informal discussions, it is often used as a generic example token to illustrate concepts in string processing, pattern matching, and data handling.

Composition and characteristics

The sequence consists of the digit zero followed by the lowercase letters y and z. The characters

Usage in education and documentation

0yz frequently appears in tutorials, textbooks, and online materials as sample input for exercises involving tokenization,

Considerations in programming

In many programming languages, 0yz would not be a valid identifier since identifiers typically cannot start

Variations and related concepts

Similar neutral strings (for example, 1xy, 0ab) are used for the same purposes in tutorials and documentation.

See also

Placeholder text, sample data, string literals, tokenization.

are
chosen
because
they
are
visually
distinct
and
do
not
form
a
common
English
word,
which
makes
0yz
useful
as
a
neutral
stand-in
in
examples
and
test
data.
regular
expressions,
lexical
analysis,
and
parsing.
It
can
serve
as
a
placeholder
value
in
demonstrations
of
data
schemas,
validation
rules,
or
programming
exercises
where
a
non-word
string
is
desirable.
with
a
digit.
As
a
value,
it
is
most
often
represented
as
a
string
literal
(for
example,
"0yz")
rather
than
as
a
variable
name.
When
used
in
test
data,
0yz
helps
distinguish
example
values
from
real
data.
The
broader
category
includes
placeholders,
sample
data,
and
token
examples
employed
to
avoid
implying
real-world
content.