mul

Multiply two double-precision floating-point numbers.

Installation

npm install @stdlib/math-base-ops-mul

Usage

var mul = require( '@stdlib/math-base-ops-mul' );

mul( x, y )

Multiplies two double-precision floating-point numbers.

var v = mul( -1.0, 5.0 );
// returns -5.0

v = mul( 2.0, 5.0 );
// returns 10.0

v = mul( 0.0, 5.0 );
// returns 0.0

v = mul( -0.0, 0.0 );
// returns -0.0

v = mul( NaN, NaN );
// returns NaN

Examples

var rand = require( '@stdlib/random-base-discrete-uniform' );
var mul = require( '@stdlib/math-base-ops-mul' );

var x;
var y;
var i;

for ( i = 0; i < 100; i++ ) {
    x = rand( -50, 50 );
    y = rand( -50, 50 );
    console.log( '%d x %d = %d', x, y, mul( x, y ) );
}

C APIs

Usage

#include "stdlib/math/base/ops/mul.h"

stdlib_base_mul( x, y )

Multiplies two double-precision floating-point numbers.

double v = stdlib_base_mul( -5.0, 2.0 );
// returns -10.0

The function accepts the following arguments:

• x: [in] double first input value.
• y: [in] double second input value.

double stdlib_base_mul( const double x, const double y );

Examples

#include "stdlib/math/base/ops/mul.h"
#include <stdio.h>

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

    double z;
    int i;
    for ( i = 0; i < 4; i++ ) {
        z = stdlib_base_mul( x[ i ], y[ i ] );
        printf( "%lf x %lf = %lf\n", x[ i ], y[ i ], z );
    }
}

See Also

• @stdlib/math-base/ops/add: compute the sum of two double-precision floating-point numbers.
• @stdlib/math-base/ops/div: divide two double-precision floating-point numbers.
• @stdlib/math-base/ops/sub: subtract two double-precision floating-point numbers.

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.