# String Index

A zero-based position used to locate a character in a String.

## What is **String Index** in JavaScript?

**String Index** — A zero-based position used to locate a character in a String.

```javascript
const city = "Denver";
const characterCount = city.length;
const firstCharacter = city[0];
```

Level: Apprentice · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/apprentice)

Updated: September 27, 2026

## In other subjects

- [String Index in C#](https://www.ask-codey.com/glossary/string-index-c-sharp)
- [String Index in Java](https://www.ask-codey.com/glossary/string-index)

Source: https://www.ask-codey.com/glossary/string-index-javascript