102 lines
2.3 KiB
Markdown
102 lines
2.3 KiB
Markdown
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# toInt32
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> Convert a [single-precision floating-point number][ieee754] to a signed 32-bit integer.
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<section class="usage">
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## Usage
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```javascript
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var float32ToInt32 = require( '@stdlib/number/float32/base/to-int32' );
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```
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#### float32ToInt32( x )
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Converts a [single-precision floating-point number][ieee754] to a signed 32-bit integer.
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```javascript
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var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
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var y = float32ToInt32( float64ToFloat32( 4294967295.0 ) );
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// returns 0
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y = float32ToInt32( float64ToFloat32( 3.14 ) );
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// returns 3
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y = float32ToInt32( float64ToFloat32( -3.14 ) );
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// returns -3
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y = float32ToInt32( float64ToFloat32( NaN ) );
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// returns 0
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y = float32ToInt32( float64ToFloat32( Infinity ) );
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// returns 0
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y = float32ToInt32( float64ToFloat32( -Infinity ) );
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// returns 0
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```
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</section>
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<!-- /.usage -->
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<section class="examples">
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## Examples
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<!-- eslint no-undef: "error" -->
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```javascript
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var randu = require( '@stdlib/random/base/randu' );
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var round = require( '@stdlib/math/base/special/round' );
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var MAX_INT = require( '@stdlib/constants/uint32/max' );
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var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
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var float32ToInt32 = require( '@stdlib/number/float32/base/to-int32' );
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var int32;
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var f32;
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var i;
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for ( i = 0; i < 500; i++ ) {
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// Generate a random single-precision floating-point integer:
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f32 = float64ToFloat32( round( randu()*MAX_INT ) );
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// Convert the single-precision floating-point integer to a signed integer:
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int32 = float32ToInt32( f32 );
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console.log( 'float32: %d => int32: %d', f32, int32 );
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}
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985
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</section>
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<!-- /.links -->
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