Array Type Annotations in TypeScript

By Hemanta Sundaray on 2023-02-15

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The simplest way to type annotate an array is by putting square brackets ([]) after the element type.

For example, suppose we have an array of strings:

let brands = ["Kia", "Toyota", "Honda"]

We can annotate it like this:

let brands: string[] = ["Kia", "Toyota", "Honda"]


An alternative method is to use the Array<type> syntax.

let brands: Array<string> = ["Kia", "Toyota", "Honda"]

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