README.md

Binary String

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

Usage

var toBinaryString = require( '@stdlib/math/base/utils/float64-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( Math.PI );
// 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( Number.POSITIVE_INFINITY );
// returns '0111111111110000000000000000000000000000000000000000000000000000'

str = toBinaryString( Number.NEGATIVE_INFINITY );
// returns '1111111111110000000000000000000000000000000000000000000000000000'

Examples

var randu = require( '@stdlib/math/base/random/randu' );
var round = require( '@stdlib/math/base/special/round' );
var pow = require( '@stdlib/math/base/special/pow' );
var smallest = require( '@stdlib/math/constants/float64-smallest' );
var toBinaryString = require( '@stdlib/math/base/utils/float64-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 );
}