toInt32

Convert a single-precision floating-point number to a signed 32-bit integer.

Usage

var float32ToInt32 = require( '@stdlib/number/float32/base/to-int32' );

float32ToInt32( x )

Converts a single-precision floating-point number to a signed 32-bit integer.

var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );

var y = float32ToInt32( float64ToFloat32( 4294967295.0 ) );
// returns -1

y = float32ToInt32( float64ToFloat32( 3.14 ) );
// returns 3

y = float32ToInt32( float64ToFloat32( -3.14 ) );
// returns -3

y = float32ToInt32( float64ToFloat32( NaN ) );
// returns 0

y = float32ToInt32( float64ToFloat32( Infinity ) );
// returns 0

y = float32ToInt32( float64ToFloat32( -Infinity ) );
// returns 0

Examples

var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var MAX_INT = require( '@stdlib/constants/math/uint32-max' );
var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
var float32ToInt32 = require( '@stdlib/number/float32/base/to-int32' );

var int32;
var f32;
var i;

for ( i = 0; i < 500; i++ ) {
    // Generate a random single-precision floating-point integer:
    f32 = float64ToFloat32( round( randu()*MAX_INT ) );

    // Convert the single-precision floating-point integer to a signed integer:
    int32 = float32ToInt32( f32 );

    console.log( 'float32: %d => int32: %d', f32, int32 );
}