Round a double-precision floating-point number toward negative infinity.
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> Round a double-precision floating-point number toward negative infinity.
``bash`
npm install @stdlib/math-base-special-floor
`javascript`
var floor = require( '@stdlib/math-base-special-floor' );
#### floor( x )
Rounds a double-precision floating-point number toward negative infinity.
`javascript
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
`
`javascript
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`
#include "stdlib/math/base/special/floor.h"
#### stdlib_base_floor( x )
Rounds a double-precision floating-point number toward negative infinity.
`c`
double y = stdlib_base_floor( 3.14 );
// returns 3.0
The function accepts the following arguments:
- x: [in] double input value.
`c`
double stdlib_base_floor( const double x );
`c
#include "stdlib/math/base/special/floor.h"
#include
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/math-base/special/ceil][@stdlib/math/base/special/ceil]: round a double-precision floating-point number toward positive infinity.
- [@stdlib/math-base/special/round][@stdlib/math/base/special/round]: round a numeric value to the nearest integer.
*
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
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---
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[@stdlib/math/base/special/ceil]: https://www.npmjs.com/package/@stdlib/math-base-special-ceil
[@stdlib/math/base/special/round]: https://www.npmjs.com/package/@stdlib/math-base-special-round