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Round a doubleprecision floatingpoint number toward negative infinity.
npm install @stdlib/mathbasespecialfloor
var floor = require( '@stdlib/mathbasespecialfloor' );
Rounds a doubleprecision floatingpoint 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
var randu = require( '@stdlib/randombaserandu' );
var floor = require( '@stdlib/mathbasespecialfloor' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0)  50.0;
console.log( 'floor(%d) = %d', x, floor( x ) );
}
#include "stdlib/math/base/special/floor.h"
Rounds a doubleprecision floatingpoint 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 );
#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 );
}
}

@stdlib/mathbase/special/ceil
: round a doubleprecision floatingpoint number toward positive infinity. 
@stdlib/mathbase/special/round
: round a numeric value to the nearest integer.
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.
See LICENSE.
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