terraform/website/docs/configuration/functions/element.html.md

layout	page_title	sidebar_current	description
functions	element function	docs-funcs-collection-element	The element function retrieves a single element from a list.

element Function

element retrieves a single element from a list.

element(list, index)

The index is zero-based. This function produces an error if used with an empty list.

Use the built-in index syntax list[index] in most cases. Use this function only for the special additional "wrap-around" behavior described below.

Examples

> element(["a", "b", "c"], 1)
b

If the given index is greater than the length of the list then the index is "wrapped around" by taking the index modulo the length of the list:

> element(["a", "b", "c"], 3)
a

Related Functions

• index finds the index for a particular element value.
• lookup retrieves a value from a map given its key.