About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

# Low Word [![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] > Return an unsigned 32-bit integer corresponding to the less significant 32 bits of a [double-precision floating-point number][ieee754].
## Installation ```bash npm install @stdlib/number-float64-base-get-low-word ```
## Usage ```javascript var getLowWord = require( '@stdlib/number-float64-base-get-low-word' ); ``` #### getLowWord( x ) Returns an unsigned 32-bit `integer` corresponding to the less significant 32 bits of a [double-precision floating-point number][ieee754]. ```javascript var w = getLowWord( 3.14e201 ); // => 10010011110010110101100010000010 // returns 2479577218 ```
## Examples ```javascript var floor = require( '@stdlib/math-base-special-floor' ); var randu = require( '@stdlib/random-base-randu' ); var pow = require( '@stdlib/math-base-special-pow' ); var getLowWord = require( '@stdlib/number-float64-base-get-low-word' ); var frac; var exp; var w; var x; var i; for ( i = 0; i < 100; i++ ) { frac = randu() * 10.0; exp = -floor( randu()*324.0 ); x = frac * pow( 10.0, exp ); w = getLowWord( x ); console.log( 'x: %d. low word: %d.', x, w ); } ```
* * *
## C APIs
### Usage ```c #include "stdlib/number/float64/base/get_low_word.h" ``` #### stdlib_base_float64_get_low_word( x, \*low ) Extracts the unsigned 32-bit integer corresponding to the less significant 32 bits of a double-precision floating-point number. ```c #include uint32_t low; stdlib_base_float64_get_low_word( 3.14, &low ); ``` The function accepts the following arguments: - **x**: `[in] double` input value. - **low**: `[out] uint32_t*` destination for lower order word. ```c void stdlib_base_float64_get_low_word( const double x, uint32_t *low ); ```
### Examples ```c #include "stdlib/number/float64/base/get_low_word.h" #include #include int main( void ) { double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 }; uint32_t low; int i; for ( i = 0; i < 4; i++ ) { stdlib_base_float64_get_low_word( x[ i ], &low ); printf( "%lf => low: %u\n", x[ i ], low ); } } ```
* * * ## See Also - [`@stdlib/number-float64/base/get-high-word`][@stdlib/number/float64/base/get-high-word]: return an unsigned 32-bit integer corresponding to the more significant 32 bits of a double-precision floating-point number. - [`@stdlib/number-float64/base/set-high-word`][@stdlib/number/float64/base/set-high-word]: set the more significant 32 bits of a double-precision floating-point number.
* * * ## 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 © 2016-2026. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/number-float64-base-get-low-word.svg [npm-url]: https://npmjs.org/package/@stdlib/number-float64-base-get-low-word [test-image]: https://github.com/stdlib-js/number-float64-base-get-low-word/actions/workflows/test.yml/badge.svg?branch=v0.2.3 [test-url]: https://github.com/stdlib-js/number-float64-base-get-low-word/actions/workflows/test.yml?query=branch:v0.2.3 [coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/number-float64-base-get-low-word/main.svg [coverage-url]: https://codecov.io/github/stdlib-js/number-float64-base-get-low-word?branch=main [chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg [chat-url]: https://stdlib.zulipchat.com [stdlib]: https://github.com/stdlib-js/stdlib [stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors [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/number-float64-base-get-low-word/tree/deno [deno-readme]: https://github.com/stdlib-js/number-float64-base-get-low-word/blob/deno/README.md [umd-url]: https://github.com/stdlib-js/number-float64-base-get-low-word/tree/umd [umd-readme]: https://github.com/stdlib-js/number-float64-base-get-low-word/blob/umd/README.md [esm-url]: https://github.com/stdlib-js/number-float64-base-get-low-word/tree/esm [esm-readme]: https://github.com/stdlib-js/number-float64-base-get-low-word/blob/esm/README.md [branches-url]: https://github.com/stdlib-js/number-float64-base-get-low-word/blob/main/branches.md [stdlib-license]: https://raw.githubusercontent.com/stdlib-js/number-float64-base-get-low-word/main/LICENSE [ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985 [@stdlib/number/float64/base/get-high-word]: https://www.npmjs.com/package/@stdlib/number-float64-base-get-high-word [@stdlib/number/float64/base/set-high-word]: https://www.npmjs.com/package/@stdlib/number-float64-base-set-high-word