npm package: @stdlib/constants-float32-exponent-mask
Description: Mask for the exponent of a single-precision floating-point number.
Author: The Stdlib Authors
Latest version: 0.2.3

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# FLOAT32_EXPONENT_MASK

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

> Mask for the exponent of a [single-precision floating-point number][ieee754].

<section class="installation">

## Installation

```bash
npm install @stdlib/constants-float32-exponent-mask
```

</section>

<section class="usage">

## Usage

<!-- eslint-disable id-length -->

```javascript
var FLOAT32_EXPONENT_MASK = require( '@stdlib/constants-float32-exponent-mask' );
```

#### FLOAT32_EXPONENT_MASK

Mask for the exponent of a [single-precision floating-point number][ieee754].

<!-- eslint-disable id-length -->

```javascript
// 0x7f800000 = 2139095040 => 0 11111111 00000000000000000000000
var bool = ( FLOAT32_EXPONENT_MASK === 0x7f800000 );
// returns true
```

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var toWord = require( '@stdlib/number-float32-base-to-word' );
var FLOAT32_EXPONENT_MASK = require( '@stdlib/constants-float32-exponent-mask' );

var x = 11.5;
var w = toWord( x ); // 0 10000010 01110000000000000000000
// returns 1094189056

// Mask off all bits except for the exponent bits:
var out = w & FLOAT32_EXPONENT_MASK; // 0 10000010 00000000000000000000000
// returns 1090519040

// Mask on the exponent bits and leave other bits unchanged:
out = w | FLOAT32_EXPONENT_MASK; // 0 11111111 01110000000000000000000
// returns 2142765056
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/constants/float32/exponent_mask.h"
```

#### STDLIB_CONSTANT_FLOAT32_EXPONENT_MASK

Macro for the mask for the exponent of a [single-precision floating-point number][ieee754].

</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">

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

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

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/constants-float32/sign-mask`][@stdlib/constants/float32/sign-mask]</span><span class="delimiter">: </span><span class="description">mask for the sign bit of a single-precision floating-point number.</span>
-   <span class="package-name">[`@stdlib/constants-float32/significand-mask`][@stdlib/constants/float32/significand-mask]</span><span class="delimiter">: </span><span class="description">mask for the significand of a single-precision floating-point number.</span>
-   <span class="package-name">[`@stdlib/constants-float32/abs-mask`][@stdlib/constants/float32/abs-mask]</span><span class="delimiter">: </span><span class="description">mask for excluding the sign bit of a single-precision floating-point number.</span>

</section>

<!-- /.related -->

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<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]

---

## License

See [LICENSE][stdlib-license].


## Copyright

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

</section>

<!-- /.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/constants-float32-exponent-mask/tree/deno
[deno-readme]: https://github.com/stdlib-js/constants-float32-exponent-mask/blob/deno/README.md
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[branches-url]: https://github.com/stdlib-js/constants-float32-exponent-mask/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/constants-float32-exponent-mask/main/LICENSE

[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985

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

[@stdlib/constants/float32/sign-mask]: https://www.npmjs.com/package/@stdlib/constants-float32-sign-mask

[@stdlib/constants/float32/significand-mask]: https://www.npmjs.com/package/@stdlib/constants-float32-significand-mask

[@stdlib/constants/float32/abs-mask]: https://www.npmjs.com/package/@stdlib/constants-float32-abs-mask

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