| --- | |
| sidebar_label: index | |
| description: The index function finds the element index for a given value in a list. | |
| --- | |
| # `index` Function | |
| `index` finds the element index for a given value in a list. | |
| ```hcl | |
| index(list, value) | |
| ``` | |
| The returned index is zero-based. This function produces an error if the given | |
| value is not present in the list. | |
| ## Examples | |
| ``` | |
| > index(["a", "b", "c"], "b") | |
| 1 | |
| ``` | |
| ## Related Functions | |
| * [`element`](../../language/functions/element.mdx) retrieves a particular element from a list given | |
| its index. |