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isPow2Uint32

Test whether an unsigned integer is a power of 2.

Installation

npm install @stdlib/math-base-assert-uint32-is-pow2

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 isPow2Uint32 = require( '@stdlib/math-base-assert-uint32-is-pow2' );

isPow2Uint32( x )

Tests whether x is a power of 2.

var bool = isPow2Uint32( 2 );
// returns true

bool = isPow2Uint32( 5 );
// returns false

Examples

var isPow2Uint32 = require( '@stdlib/math-base-assert-uint32-is-pow2' );

var i;

for ( i = 0; i < 100; i++ ) {
    console.log( 'isPow2( %d ) = %s', i, isPow2Uint32( i ) );
}

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C APIs

Usage

#include "stdlib/math/base/assert/uint32_is_pow2.h"

stdlib_base_uint32_is_pow2( x )

Tests whether an unsigned integer is a power of 2.

#include <stdbool.h>

bool out = stdlib_base_uint32_is_pow2( 5 );
// returns false

out = stdlib_base_uint32_is_pow2( 2 );
// returns true

The function accepts the following arguments:

• x: [in] uint32_t input value.

bool stdlib_base_uint32_is_pow2( const uint32_t x );

Examples

#include "stdlib/math/base/assert/uint32_is_pow2.h"
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>

int main( void ) {
    const uint32_t x[] = { 0, 1, 2, 3, 4, 5, 8, 10, 16, 1024 };
    bool b;
    int i;

    for ( i = 0; i < 9; i++ ) {
        b = stdlib_base_uint32_is_pow2( x[ i ] );
        printf( "Value: %u. is a power of 2? %s.\n", x[ i ], ( b ) ? "True" : "False" );
    }
}

s

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.