isNegativeFinite

Test if a double-precision floating-point numeric value is a negative finite number.

Installation

npm install @stdlib/math-base-assert-is-negative-finite

Usage

var isNegativeFinite = require( '@stdlib/math-base-assert-is-negative-finite' );

isNegativeFinite( x )

Tests if a double-precision floating-point numeric value is a negative finite number.

var bool = isNegativeFinite( -3.14 );
// returns true

bool = isNegativeFinite( 2.0 );
// returns false

Examples

var isNegativeFinite = require( '@stdlib/math-base-assert-is-negative-finite' );

var bool = isNegativeFinite( -3.14 );
// returns true

bool = isNegativeFinite( 3.14 );
// returns false

bool = isNegativeFinite( 0.0 );
// returns false

bool = isNegativeFinite( -0.0 );
// returns false

bool = isNegativeFinite( NaN );
// returns false

C APIs

Usage

#include "stdlib/math/base/assert/is_negative_finite.h"

stdlib_base_is_negative_finite( x )

Tests if a double-precision floating-point numeric value is a negative finite number.

#include <stdbool.h>

bool out = stdlib_base_is_negative_finite( 1.0 );
// returns false

out = stdlib_base_is_negative_finite( -4.0 );
// returns true

The function accepts the following arguments:

• x: [in] double input value.

bool stdlib_base_is_negative_finite( const double x );

Examples

#include "stdlib/math/base/assert/is_negative_finite.h"
#include "stdlib/constants/float64/ninf.h"
#include <stdio.h>
#include <stdbool.h>

int main( void ) {
    const double x[] = { 5.0, -5.0, 3.14, -3.14, 0.0/0.0, STDLIB_CONSTANT_FLOAT64_NINF };

    bool b;
    int i;
    for ( i = 0; i < 6; i++ ) {
        b = stdlib_base_is_negative_finite( x[ i ] );
        printf( "x = %lf, is_negative_finite(x) = %s\n", x[ i ], ( b ) ? "True" : "False" );
    }
}

Notice

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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.