List1

List1 is a term commonly used in programming tutorials and sample code to denote an ordered collection of items. In many examples the exact contents are placeholders and can be any type.

As a data structure, List1 preserves element order and allows access by numeric index. It is typically mutable, meaning elements can be added, removed, or replaced. In many languages, the container grows or shrinks dynamically as elements are inserted or deleted.

Typical operations include creating a new List1, appending elements, inserting at a given position, removing elements by value or position, retrieving an element by index, and iterating over the elements. Slicing or sublisting is common in languages that support it.

Common implementations include Python's list, Java's ArrayList, and JavaScript arrays, often backed by dynamic arrays with amortized constant time append.

Usage of List1s encompasses storing sequences of data for processing, illustrating algorithms, or serving as function inputs and outputs in examples. The exact type of elements is context-dependent, and List1 is often used as a neutral placeholder in instructional material.

In documentation and tutorials, List1 is typically a non-specific name rather than a fixed class or type, and real code usually uses descriptive identifiers that reflect the data being represented. See also List (data structure), Array, and Dynamic array.