Round a numeric value to the nearest power of two toward positive infinity.
var ceil2 = require( '@stdlib/math/base/special/ceil2' );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 NaNvar uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var ceil2 = require( '@stdlib/math/base/special/ceil2' );
var opts = {
'dtype': 'float64'
};
var x = uniform( 100, -50.0, 50.0, opts );
logEachMap( 'x: %0.4f. Rounded: %0.4f.', x, ceil2 );#include "stdlib/math/base/special/ceil2.h"Rounds a numeric value to the nearest power of two toward positive infinity.
double y = stdlib_base_ceil2( 3.14 );
// returns 4.0The function accepts the following arguments:
- x:
[in] doubleinput value.
double stdlib_base_ceil2( const double x );#include "stdlib/math/base/special/ceil2.h"
#include <stdio.h>
int main( void ) {
const double x[] = { 3.14, -3.14, 0.5, 0.0 / 0.0 };
double y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_ceil2( x[ i ] );
printf( "ceil2(%lf) = %lf\n", x[ i ], y );
}
}@stdlib/math/base/special/ceil: round a double-precision floating-point number toward positive infinity.@stdlib/math/base/special/ceil10: round a numeric value to the nearest power of 10 toward positive infinity.@stdlib/math/base/special/floor2: round a numeric value to the nearest power of two toward negative infinity.@stdlib/math/base/special/round2: round a numeric value to the nearest power of two on a linear scale.