# Floor

Round a complex number toward negative infinity.

## Usage

``````var cfloor = require( '@stdlib/math/base/complex/floor' );
``````

#### cfloor( [out,] re, im )

Rounds a `complex` number comprised of a real component `re` and an imaginary component `im` toward negative infinity.

``````var v = cfloor( -4.2, 5.5 );
// returns [ -5.0, 5.0 ]

v = cfloor( 9.99999, 0.1 );
// returns [ 9.0, 0.0 ]

v = cfloor( 0.0, 0.0 );
// returns [ 0.0, 0.0 ]

v = cfloor( NaN, NaN );
// returns [ NaN, NaN ]
``````

By default, the function returns real and imaginary components as a two-element `array`. To avoid unnecessary memory allocation, the function supports providing an output (destination) object.

``````var Float32Array = require( '@stdlib/array/float32' );

var out = new Float32Array( 2 );

var v = cfloor( out, -4.2, 5.5 );
// returns <Float32Array>[ -5.0, 5.0 ]

var bool = ( v === out );
// returns true
``````

## Examples

``````var Complex128 = require( '@stdlib/complex/float64' );
var randu = require( '@stdlib/random/base/randu' );
var real = require( '@stdlib/complex/real' );
var imag = require( '@stdlib/complex/imag' );
var cfloor = require( '@stdlib/math/base/complex/floor' );

var re;
var im;
var z;
var o;
var w;
var i;

for ( i = 0; i < 100; i++ ) {
re = ( randu()*100.0 ) - 50.0;
im = ( randu()*100.0 ) - 50.0;
z = new Complex128( re, im );
o = cfloor( real(z), imag(z) );
w = new Complex128( o[ 0 ], o[ 1 ] );
console.log( 'floor(%s) = %s', z.toString(), w.toString() );
}
``````