27 lines
646 B
Markdown
27 lines
646 B
Markdown
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[Home](./index.md) > [@apextoaster/js-utils](./js-utils.md) > [countOf](./js-utils.countof.md)
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## countOf() function
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Calculate the "length" of an array or value.
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Arrays return their length, single values return 1, and nil values return 0. This counts the number of elements that setOrPush would add.
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<b>Signature:</b>
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```typescript
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export declare function countOf(val: unknown): number;
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```
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## Parameters
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| Parameter | Type | Description |
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| --- | --- | --- |
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| val | <code>unknown</code> | |
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<b>Returns:</b>
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`number`
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