# json.as_big_integer_or_null · Rell standard library · Chromia Docs (concept)

> pure function as_ big_ integer_ or_ null(): big_integer ? Convert this JSON value to a big_integer . All JSON values that can be converted to integer with 

Source: https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/json/as_big_integer_or_null/

FUNCTION

# json.as\_big\_integer\_or\_null

```signature
pure function as_big_integer_or_null(): big_integer?
```

Convert this JSON value to a `big_integer`.

All JSON values that can be converted to `integer` with `as_integer_or_null()` can also be converted
to `big_integer` with `as_big_integer_or_null()`, though the reverse is not true, since
`big_integer` values may fall outside the `integer` range.

**Returns**

this JSON value as a `big_integer`, or null if it cannot be converted to a `big_integer`

Since 0.14.16

[View this page on docs.chromia.com](https://docs.chromia.com/pages/rell-stdlib/-rell%20-system%20-library/%5Broot%5D/json/as_big_integer_or_null.html)Generated API reference, mirrored from the live docs