@stdlib/number-float64-base-to-binary-string

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

Usage no npm install needed!

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README

Binary String

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

Installation

npm install @stdlib/number-float64-base-to-binary-string

Usage

var toBinaryString = require( '@stdlib/number-float64-base-to-binary-string' );

toBinaryString( x )

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

var str = toBinaryString( 4.0 );
// returns '0100000000010000000000000000000000000000000000000000000000000000'

str = toBinaryString( 3.141592653589793 );
// returns '0100000000001001001000011111101101010100010001000010110100011000'

str = toBinaryString( -1.0e308 );
// returns '1111111111100001110011001111001110000101111010111100100010100000'

The function handles subnormals.

str = toBinaryString( -3.14e-320 );
// returns '1000000000000000000000000000000000000000000000000001100011010011'

str = toBinaryString( 5.0e-324 );
// returns '0000000000000000000000000000000000000000000000000000000000000001'

The function handles special values.

str = toBinaryString( 0.0 );
// returns '0000000000000000000000000000000000000000000000000000000000000000'

str = toBinaryString( -0.0 );
// returns '1000000000000000000000000000000000000000000000000000000000000000'

str = toBinaryString( NaN );
// returns '0111111111111000000000000000000000000000000000000000000000000000'

str = toBinaryString( Infinity );
// returns '0111111111110000000000000000000000000000000000000000000000000000'

str = toBinaryString( -Infinity );
// returns '1111111111110000000000000000000000000000000000000000000000000000'

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 toBinaryString = require( '@stdlib/number-float64-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 );
    b = toBinaryString( 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.

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License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.