npm package: @stdlib/math-base-special-powf
Description: Exponential function for a single-precision floating-point number.
Author: The Stdlib Authors
Latest version: 0.1.1

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  <summary>
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</details>

# Exponential Function

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> [Exponential function][exponential-function] for a single-precision floating-point number.

<section class="intro">

The [exponential function][exponential-function] is defined as

<!-- <equation class="equation" label="eq:exponential_function" align="center" raw="y = b^x" alt="Exponential function"> -->

<!-- </equation> -->

where `b` is the **base** and `x` is the **exponent**.

</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/math-base-special-powf
```

</section>

<section class="usage">

## Usage

```javascript
var powf = require( '@stdlib/math-base-special-powf' );
```

#### powf( base, exponent )

Evaluates the [exponential function][exponential-function] for a single-precision floating-point number.

```javascript
var v = powf( 2.0, 3.0 );
// returns 8.0

v = powf( 4.0, 0.5 );
// returns 2.0

v = powf( 100.0, 0.0 );
// returns 1.0

v = powf( 3.1415927410125732, 5.0 );
// returns ~306.0197

v = powf( 3.1415927410125732, -0.2 );
// returns ~0.7954

v = powf( NaN, 3.0 );
// returns NaN

v = powf( 5.0, NaN );
// returns NaN

v = powf( NaN, NaN );
// returns NaN
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var powf = require( '@stdlib/math-base-special-powf' );

var opts = {
    'dtype': 'float32'
};
var b = discreteUniform( 100, 0, 10, opts );
var x = discreteUniform( 100, -5, 5, opts );

logEachMap( '%d^%d = %0.4f', b, x, powf );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/math/base/special/powf.h"
```

#### stdlib_base_powf( base, exponent )

Evaluates the [exponential function][exponential-function] for a single-precision floating-point number.

```c
float out = stdlib_base_powf( 3.1415927410125732f, 5.0f );
// returns ~306.0197f

out = stdlib_base_powf( 4.0f, 0.5f );
// returns 2.0f
```

The function accepts the following arguments:

-   **base**: `[in] float` base.
-   **exponent**: `[in] float` exponent.

```c
float stdlib_base_powf( const float base, const float exponent );
```

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/math/base/special/powf.h"
#include <stdlib.h>
#include <stdio.h>

int main( void ) {
    float out;
    float b;
    float x;
    int i;

    for ( i = 0; i < 100; i++ ) {
        b = ( ( (float)rand() / (float)RAND_MAX ) * 10.0f );
        x = ( ( (float)rand() / (float)RAND_MAX ) * 10.0f ) - 5.0f;
        out = stdlib_base_powf( b, x );
        printf( "powf(%f, %f) = %f\n", b, x, out );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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[stdlib]: https://github.com/stdlib-js/stdlib

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/math-base-special-powf/tree/deno
[deno-readme]: https://github.com/stdlib-js/math-base-special-powf/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/math-base-special-powf/tree/umd
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[esm-url]: https://github.com/stdlib-js/math-base-special-powf/tree/esm
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[branches-url]: https://github.com/stdlib-js/math-base-special-powf/blob/main/branches.md

[exponential-function]: https://en.wikipedia.org/wiki/Exponential_function

<!-- <related-links> -->

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</section>

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