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umul

$Build Status$

Perform C-like multiplication of two unsigned 32-bit integers.

Installation

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

Alternatively,

To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
If you are using Deno, visit the deno branch (see README for usage intructions).
For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

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

umul( a, b )

Performs C-like multiplication of two unsigned 32-bit integers.

var v = umul( 10>>>0, 4>>>0 );
// returns 40

v = umul( 2147483648>>>0, 5>>>0 ); // 2^31 * 5 = 10737418240 => 32-bit integer overflow
// returns 2147483648

Notes

The function emulates C-like multiplication of two unsigned 32-bit integers.

Examples

var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var UINT32_MAX = require( '@stdlib/constants-uint32-max' );
var umul = require( '@stdlib/math-base-ops-umul' );

var randi;
var a;
var b;
var y;
var i;

randi = discreteUniform( 0, UINT32_MAX );

for ( i = 0; i < 100; i++ ) {
    a = randi()>>>0;
    b = randi()>>>0;
    y = umul( a, b );
    console.log( '%d x %d = %d', a, b, y );
}

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.

stdlib-js/math-base-ops-umul