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floor

README.md

Floor

Round a double-precision floating-point number toward negative infinity.

Usage

var floor = require( '@stdlib/math/base/special/floor' );

floor( x )

Rounds a double-precision floating-point number toward negative infinity.

var v = floor( -4.2 );
// returns -5.0

v = floor( 9.99999 );
// returns 9.0

v = floor( 0.0 );
// returns 0.0

v = floor( NaN );
// returns NaN

Examples

var uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var floor = require( '@stdlib/math/base/special/floor' );

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, -50.0, 50.0, opts );

logEachMap( 'floor(%0.4f) = %d', x, floor );

C APIs

Usage

#include "stdlib/math/base/special/floor.h"

stdlib_base_floor( x )

Rounds a double-precision floating-point number toward negative infinity.

double y = stdlib_base_floor( 3.14 );
// returns 3.0

The function accepts the following arguments:

  • x: [in] double input value.
double stdlib_base_floor( const double x );

Examples

#include "stdlib/math/base/special/floor.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_floor( x[ i ] );
        printf( "floor(%lf) = %lf\n", x[ i ], y );
    }
}

See Also