# Object keys in variables in JavaScript

Object keys can be stored in variables. Let's look at an example. Let's have the following object:

`let obj = {a: 1, b: 2, c: 3};`

Let the variable store the key:

`let key = 'a';`

Derive an object element by key:

`console.log(obj[key]); // shows 1`

Given the following object:

`let obj = {x: 1, y: 2, z: 3};`

The variable `key` is given, which stores one of the keys of our object. Use this variable to output the corresponding element of the object.

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