Square Root

Compute an integer square root.

Installation

npm install @stdlib/math-base-special-fast-uint32-sqrt

Usage

var sqrtUint32 = require( '@stdlib/math-base-special-fast-uint32-sqrt' );

sqrtUint32( x )

Returns an approximate square root of an unsigned 32-bit integer x.

var v = sqrtUint32( 9 >>> 0 );
// returns 3

v = sqrtUint32( 2 >>> 0 );
// returns 1

v = sqrtUint32( 3 >>> 0 );
// returns 1

v = sqrtUint32( 0 >>> 0 );
// returns 0

Notes

• Prefer hardware sqrt over a software implementation.
• When using a software sqrt, this implementation provides a performance boost when an application requires only approximate computations for integer arguments.
• For applications requiring high-precision, this implementation is never suitable.

Examples

var sqrtUint32 = require( '@stdlib/math-base-special-fast-uint32-sqrt' );

var v;
var i;

for ( i = 0; i < 101; i++ ) {
    v = sqrtUint32( i >>> 0 );
    console.log( 'sqrt(%d) ≈ %d', i, v );
}

C APIs

Usage

#include "stdlib/math/base/special/fast/uint32_sqrt.h"

stdlib_base_fast_uint32_sqrt( x )

Compute an integer square root.

#include <stdint.h>

uint32_t out = stdlib_base_fast_uint32_sqrt( 2 );
// returns 1

out = stdlib_base_fast_uint32_sqrt( 8 );
// returns 3

The function accepts the following arguments:

• x: [in] uint32_t input value.

uint32_t stdlib_base_fast_uint32_sqrt( const uint32_t x );

Examples

#include "stdlib/math/base/special/fast/uint32_sqrt.h"
#include <stdio.h>
#include <stdint.h>

int main( void ) {
    const uint32_t x[] = { 10, 17, 20, 22, 98 };

    uint32_t y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_fast_uint32_sqrt( x[ i ] );
        printf( "uint32_sqrt(%u) = %u\n", x[ i ], y );
    }
}

See Also

• @stdlib/math-base/special/sqrt: compute the principal square root of a double-precision floating-point number.

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.