# `fromBase`

## Description

Converts a string representation of a number in a given base into its numeric value.

For example, `"101"` in base `2` becomes `5` in base `10`.

## Syntax

Like many functions in DataPrime, `fromBase` supports [two notations](https://coralogix.com/docs/dataprime/language-reference/functions-reference/index.md), **function** and **method** notation. These interchangeable forms allow flexibility in how you structure expressions.

```dataprime
fromBase(string: string, radix: number): number
```

```dataprime
(string: string).fromBase(radix: number): number
```

## Arguments

| Name   | Type   | Required | Description                                                           |
| ------ | ------ | -------- | --------------------------------------------------------------------- |
| string | string | **true** | The string containing the number                                      |
| radix  | number | **true** | The base of the string representation (e.g. hexadecimal is base `16`) |

## Example

**Use case: Parse a hexadecimal string**

Convert a hexadecimal string to a numeric value so it can be used in calculations.

### Example data

```json
{
    "hex_value": "FF00FF"
}
```

### Example query

```dataprime
create num_value from fromBase(hex_value, 16)
```

```dataprime
create num_value from hex_value.fromBase(16)
```

### Example output

```json
{
    "hex_value": "FF00FF",
    "num_value": 16711935
}
```