@stdlib/number-float32-base-to-binary-string NPM

To Binary String

Return a string giving the literal bit representation of a single-precision floating-point number.

Installation

npm install @stdlib/number-float32-base-to-binary-string

Usage

var toBinaryStringf = require( '@stdlib/number-float32-base-to-binary-string' );

toBinaryStringf( x )

Returns a string giving the literal bit representation of a single-precision floating-point number.

var toFloat32 = require( '@stdlib/number-float64-base-to-float32' );

var str = toBinaryStringf( toFloat32( 4.0 ) );
// returns '01000000100000000000000000000000'

str = toBinaryStringf( toFloat32( 3.141592653589793 ) );
// returns '01000000010010010000111111011011'

str = toBinaryStringf( toFloat32( -1.0e38 ) );
// returns '11111110100101100111011010011001'

The function handles subnormals.

var toFloat32 = require( '@stdlib/number-float64-base-to-float32' );

var str = toBinaryStringf( toFloat32( -3.14e-39 ) );
// returns '10000000001000100011000100001011'

str = toBinaryStringf( toFloat32( 1.4e-45 ) );
// returns '00000000000000000000000000000001'

The function handles special values.

var PINF = require( '@stdlib/constants-float32-pinf' );
var NINF = require( '@stdlib/constants-float32-ninf' );

var str = toBinaryStringf( 0.0 );
// returns '00000000000000000000000000000000'

str = toBinaryStringf( -0.0 );
// returns '10000000000000000000000000000000'

str = toBinaryStringf( NaN );
// returns '01111111110000000000000000000000'

str = toBinaryStringf( PINF );
// returns '01111111100000000000000000000000'

str = toBinaryStringf( NINF );
// returns '11111111100000000000000000000000'

Examples

var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var pow = require( '@stdlib/math-base-special-pow' );
var float64ToFloat32 = require( '@stdlib/number-float64-base-to-float32' );
var toBinaryStringf = require( '@stdlib/number-float32-base-to-binary-string' );

var frac;
var sign;
var exp;
var b;
var x;
var i;

// Convert random numbers to literal bit representations...
for ( i = 0; i < 100; i++ ) {
    if ( randu() < 0.5 ) {
        sign = -1.0;
    } else {
        sign = 1.0;
    }
    frac = randu() * 10.0;
    exp = round( randu()*100.0 );
    if ( randu() < 0.5 ) {
        exp = -exp;
    }
    x = sign * frac * pow( 2.0, exp );
    x = float64ToFloat32( x );
    b = toBinaryStringf( x );
    console.log( b );
}

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.