How to Create an Array of Multiple Data Types in TypeScript ?

In TypeScript, you can not directly define an array as you usually define it in JavaScript. You need to explicitly type the array with a particular data type whose values can be stored inside it. The type of an array can be specified using the colon syntax followed by the data type (:type). You can also create arrays that can store values of multiple data types using the Union type to explicitly type the array.

Example: The below code will illustrate how you can create an array that stores values of multiple data types in TypeScript.

Javascript

const singleTypeArr: string[] =
    ["GFG", "TypeScript"];

const multiTypeArr:
    (number | string | boolean)[] =
    [12, "GFG", true, "TypeScript"];

console.log(singleTypeArr);
console.log(multiTypeArr);

Output:

["GFG", "TypeScript"]
[12, "GFG", true, "TypeScript"]