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

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

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

FUNCTION

# json.as\_big\_integer

```signature
pure function as_big_integer(): big_integer
```

Convert this JSON value to a `big_integer`.

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

**Throws**

* `exception` — if this JSON value 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.html)Generated API reference, mirrored from the live docs