npm package: @stdlib/number-float64-base-to-int32
Description: Convert a double-precision floating-point number to a signed 32-bit integer.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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  <p>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.</p>
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# toInt32

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

> Convert a [double-precision floating-point number][ieee754] to a signed 32-bit integer.

<section class="installation">

## Installation

```bash
npm install @stdlib/number-float64-base-to-int32
```

</section>

<section class="usage">

## Usage

```javascript
var float64ToInt32 = require( '@stdlib/number-float64-base-to-int32' );
```

#### float64ToInt32( x )

Converts a [double-precision floating-point number][ieee754] to a signed 32-bit integer.

```javascript
var y = float64ToInt32( 4294967295.0 );
// returns -1

y = float64ToInt32( 3.14 );
// returns 3

y = float64ToInt32( -3.14 );
// returns -3

y = float64ToInt32( NaN );
// returns 0

y = float64ToInt32( Infinity );
// returns 0

y = float64ToInt32( -Infinity );
// returns 0
```

</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 MAX_INT = require( '@stdlib/constants-uint32-max' );
var float64ToInt32 = require( '@stdlib/number-float64-base-to-int32' );

var int32;
var f64;
var i;

for ( i = 0; i < 500; i++ ) {
    // Generate a random double-precision floating-point integer:
    f64 = round( randu()*MAX_INT );

    // Convert the double-precision floating-point integer to a signed integer:
    int32 = float64ToInt32( f64 );

    console.log( 'float64: %d => int32: %d', f64, int32 );
}
```

</section>

<!-- /.examples -->

<!-- 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/number-float64/base/to-uint32`][@stdlib/number/float64/base/to-uint32]</span><span class="delimiter">: </span><span class="description">convert a double-precision floating-point number to an unsigned 32-bit integer.</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>

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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/number-float64-base-to-int32/tree/deno
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/number-float64-base-to-int32/main/LICENSE

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

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[@stdlib/number/float64/base/to-uint32]: https://www.npmjs.com/package/@stdlib/number-float64-base-to-uint32

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</section>

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