# Array of digits of a number in JavaScript

Let's get an array of digits of a number. Let the following number be given:

`let num = 12345;`

Trying to expand a number in terms of `spread` will result in an error, since numbers are not iterable:

`let num = 12345; let arr = [...num]; // an error console.log(arr);`

To solve the problem, we convert the number to a string:

`let num = 12345; let arr = [...String(num)]; console.log(arr); // ['1', '2', '3', '4', '5']`

We, however, have an array of strings, not numbers. Let's fix the problem with a trick using the `map` method:

`let num = 12345; let arr = [...String(num)].map(Number); console.log(arr); // [1, 2, 3, 4, 5]`

Given a number. Find the sum of its digits.

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