Multiply two double-precision floating-point numbers.
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> Multiply two double-precision floating-point numbers.
``bash`
npm install @stdlib/number-float64-base-mul
`javascript`
var mul = require( '@stdlib/number-float64-base-mul' );
#### mul( x, y )
Multiplies two double-precision floating-point numbers.
`javascript
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
`
`javascript
var rand = require( '@stdlib/random-base-discrete-uniform' );
var mul = require( '@stdlib/number-float64-base-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`
#include "stdlib/number/float64/base/mul.h"
#### stdlib_base_float64_mul( x, y )
Multiplies two double-precision floating-point numbers.
`c`
double v = stdlib_base_float64_mul( -5.0, 2.0 );
// returns -10.0
The function accepts the following arguments:
- x: [in] double first input value.[in] double
- y: second input value.
`c`
double stdlib_base_float64_mul( const double x, const double y );
`c
#include "stdlib/number/float64/base/mul.h"
#include
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_float64_mul( x[ i ], y[ i ] );
printf( "%lf x %lf = %lf\n", x[ i ], y[ i ], z );
}
}
`
*
- [@stdlib/number-float64/base/add][@stdlib/number/float64/base/add]: compute the sum of two double-precision floating-point numbers.
- [@stdlib/number-float64/base/div][@stdlib/number/float64/base/div]: divide two double-precision floating-point numbers.
- [@stdlib/number-float64/base/sub][@stdlib/number/float64/base/sub]: subtract two double-precision floating-point numbers.
*
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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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/number-float64-base-mul/tree/deno
[deno-readme]: https://github.com/stdlib-js/number-float64-base-mul/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/number-float64-base-mul/tree/umd
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[esm-readme]: https://github.com/stdlib-js/number-float64-base-mul/blob/esm/README.md
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[@stdlib/number/float64/base/add]: https://www.npmjs.com/package/@stdlib/number-float64-base-add
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[@stdlib/number/float64/base/sub]: https://www.npmjs.com/package/@stdlib/number-float64-base-sub