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

var x;
var i;

for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0) - 50.0;
console.log( 'floor(%d) = %d', x, floor( x ) );
}
``````

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() {
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 );
}
}
``````