npm package: @stdlib/number-float64-base-mul
Description: Multiply two double-precision floating-point numbers.
Author: The Stdlib Authors
Latest version: 0.1.1

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# mul

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> Multiply two double-precision floating-point numbers.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/number-float64-base-mul
```

</section>

<section class="usage">

## Usage

```javascript
var mul = require( '@stdlib/number-float64-base-mul' );
```

#### mul( x, y )

Multiplies two double-precision floating-point numbers.

```javascript
var v = mul( -1.0, 5.0 );
// returns -5.0

v = mul( 2.0, 5.0 );
// returns 10.0

v = mul( 0.0, 5.0 );
// returns 0.0

v = mul( -0.0, 0.0 );
// returns -0.0

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

</section>

<!-- /.usage -->

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<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var rand = require( '@stdlib/random-base-discrete-uniform' );
var mul = require( '@stdlib/number-float64-base-mul' );

var x;
var y;
var i;

for ( i = 0; i < 100; i++ ) {
    x = rand( -50, 50 );
    y = rand( -50, 50 );
    console.log( '%d x %d = %d', x, y, mul( x, y ) );
}
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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<section class="intro">

</section>

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<section class="usage">

### Usage

```c
#include "stdlib/number/float64/base/mul.h"
```

#### stdlib_base_float64_mul( x, y )

Multiplies two double-precision floating-point numbers.

```c
double v = stdlib_base_float64_mul( -5.0, 2.0 );
// returns -10.0
```

The function accepts the following arguments:

-   **x**: `[in] double` first input value.
-   **y**: `[in] double` second input value.

```c
double stdlib_base_float64_mul( const double x, const double y );
```

</section>

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<section class="notes">

</section>

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

<section class="examples">

### Examples

```c
#include "stdlib/number/float64/base/mul.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
    const double y[] = { 3.14, -3.14, -0.0, 0.0/0.0 };

    double z;
    int i;
    for ( i = 0; i < 4; i++ ) {
        z = stdlib_base_float64_mul( x[ i ], y[ i ] );
        printf( "%lf x %lf = %lf\n", x[ i ], y[ i ], z );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/number-float64/base/add`][@stdlib/number/float64/base/add]</span><span class="delimiter">: </span><span class="description">compute the sum of two double-precision floating-point numbers.</span>
-   <span class="package-name">[`@stdlib/number-float64/base/div`][@stdlib/number/float64/base/div]</span><span class="delimiter">: </span><span class="description">divide two double-precision floating-point numbers.</span>
-   <span class="package-name">[`@stdlib/number-float64/base/sub`][@stdlib/number/float64/base/sub]</span><span class="delimiter">: </span><span class="description">subtract two double-precision floating-point numbers.</span>

</section>

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* * *

## 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].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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