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ceil2
Round a numeric value to the nearest power of two toward positive infinity.
Installation
npm install @stdlib/mathbasespecialceil2
Usage
var ceil2 = require( '@stdlib/mathbasespecialceil2' );
ceil2( x )
Rounds a numeric
value to the nearest power of two toward positive infinity.
var v = ceil2( 4.2 );
// returns 4.0
v = ceil2( 4.5 );
// returns 4.0
v = ceil2( 4.6 );
// returns 4.0
v = ceil2( 9.99999 );
// returns 16.0
v = ceil2( 9.5 );
// returns 16.0
v = ceil2( 13.0 );
// returns 16.0
v = ceil2( 13.0 );
// returns 8.0
v = ceil2( 0.0 );
// returns 0.0
v = ceil2( 0.0 );
// returns 0.0
v = ceil2( Infinity );
// returns Infinity
v = ceil2( Infinity );
// returns Infinity
v = ceil2( NaN );
// returns NaN
Examples
var randu = require( '@stdlib/randombaserandu' );
var ceil2 = require( '@stdlib/mathbasespecialceil2' );
var x;
var v;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0)  50.0;
v = ceil2( x );
console.log( 'Value: %d. Rounded: %d.', x, v );
}
See Also

@stdlib/mathbase/special/ceil
: round a doubleprecision floatingpoint number toward positive infinity. 
@stdlib/mathbase/special/ceil10
: round a numeric value to the nearest power of 10 toward positive infinity. 
@stdlib/mathbase/special/floor2
: round a numeric value to the nearest power of two toward negative infinity. 
@stdlib/mathbase/special/round2
: round a numeric value to the nearest power of two on a linear scale.
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.
Community
License
See LICENSE.
Copyright
Copyright © 20162024. The Stdlib Authors.