Number of significand bits in the high word of a double-precision floating-point number.
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> Number of significand bits in the high word of a [double-precision floating-point number][ieee754].
``bash`
npm install @stdlib/constants-float64-num-high-word-significand-bits
`javascript`
var FLOAT64_NUM_HIGH_WORD_SIGNIFICAND_BITS = require( '@stdlib/constants-float64-num-high-word-significand-bits' );
#### FLOAT64_NUM_HIGH_WORD_SIGNIFICAND_BITS
Number of significand bits in the high word of a [double-precision floating-point number][ieee754].
`javascript`
var bool = ( FLOAT64_NUM_HIGH_WORD_SIGNIFICAND_BITS === 20 );
// returns true
`javascript
var FLOAT64_NUM_HIGH_WORD_SIGNIFICAND_BITS = require( '@stdlib/constants-float64-num-high-word-significand-bits' );
console.log( FLOAT64_NUM_HIGH_WORD_SIGNIFICAND_BITS );
// => 20
`
*
`c`
#include "stdlib/constants/float64/num_high_word_significand_bits.h"
#### STDLIB_CONSTANT_FLOAT64_NUM_HIGH_WORD_SIGNIFICAND_BITS
Number of significand bits in the high word of a [double-precision floating-point number][ieee754].
*
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