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# Exponential Function

> [Exponential function][exponential-function].

<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"> -->

<div class="equation" align="center" data-raw-text="y = b^x" data-equation="eq:exponential_function">
    <img src="https://cdn.rawgit.com/stdlib-js/stdlib/7e0a95722efd9c771b129597380c63dc6715508b/lib/node_modules/@stdlib/math/base/special/pow/docs/img/equation_exponential_function.svg" alt="Exponential function">
    <br>
</div>

<!-- </equation> -->

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

</section>

<!-- /.intro -->

<section class="usage">

## Usage

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

#### pow( base, exponent )

Evaluates the [exponential function][exponential-function].

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

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

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

v = pow( 3.141592653589793, 5.0 );
// returns ~306.0197

v = pow( 3.141592653589793, -0.2 );
// returns ~0.7954

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

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

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

</section>

<!-- /.usage -->

<section class="examples">

## Examples

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

```javascript
var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var pow = require( '@stdlib/math/base/special/pow' );

var b;
var x;
var i;

for ( i = 0; i < 100; i++ ) {
    b = round( randu()*10.0 );
    x = round( randu()*10.0 ) - 5.0;
    console.log( '%d^%d = %d', b, x, pow( b, x ) );
}
```

</section>

<!-- /.examples -->

<section class="links">

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

</section>

<!-- /.links -->
