@stdlib/number-float64-base-to-int32 NPM

toInt32

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

Installation

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

Usage

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

float64ToInt32( x )

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

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

Examples

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 );
}

Notice

This package is part of 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, see the main project repository.