floor2
Round a numeric value to the nearest power of two toward negative infinity.
Usage
var floor2 = require( '@stdlib/math/base/special/floor2' );
floor2( x )
Rounds a numeric
value to the nearest power of two toward negative infinity.
var v = floor2( -4.2 );
// returns -8.0
v = floor2( -4.5 );
// returns -8.0
v = floor2( -4.6 );
// returns -8.0
v = floor2( 9.99999 );
// returns 8.0
v = floor2( 9.5 );
// returns 8.0
v = floor2( 13.0 );
// returns 8.0
v = floor2( -13.0 );
// returns -16.0
v = floor2( 0.0 );
// returns 0.0
v = floor2( -0.0 );
// returns -0.0
v = floor2( Infinity );
// returns Infinity
v = floor2( -Infinity );
// returns -Infinity
v = floor2( NaN );
// returns NaN
Examples
var randu = require( '@stdlib/random/base/randu' );
var floor2 = require( '@stdlib/math/base/special/floor2' );
var x;
var v;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0) - 50.0;
v = floor2( x );
console.log( 'Value: %d. Rounded: %d.', x, v );
}