---
url: https://developer.youcan.shop/themes/filters/arrays/sum.md
---
# Sum

Returns the sum of the numbers in an array. With a property name, the filter adds the values of this property. Nested arrays are added too. Values that are not numbers count as `0`.

```liquid
{{ array | sum: property }}
```

## Example

::: details Data

```json
{
  "quantities": [
    1,
    2,
    3.5
  ],
  "products": [
    {
      "title": "Hat",
      "price": 10
    },
    {
      "title": "Tee",
      "price": 25.5
    },
    {
      "title": "Cap",
      "price": 8
    }
  ]
}
```

:::

```liquid
{{ quantities | sum }}
{{ products | sum: 'price' }}
```

::: tip Output

```html
6.5
43.5
```

:::