isComposite

Test if a number is a composite.

A composite number is defined as a positive integer value greater than 1 which has at least one divisor other than 1 and itself (i.e., an integer value which can be formed by multiplying two smaller positive integers).

Installation

npm install @stdlib/math-base-assert-is-composite

Usage

var isComposite = require( '@stdlib/math-base-assert-is-composite' );

isComposite( x )

Tests if a number is a composite.

var bool = isComposite( 4.0 );
// returns true

Examples

var isComposite = require( '@stdlib/math-base-assert-is-composite' );

var bool = isComposite( 4.0 );
// returns true

bool = isComposite( 7.0 );
// returns false

bool = isComposite( NaN );
// returns false

C APIs

Usage

#include "stdlib/math/base/special/is_composite.h"

stdlib_base_is_composite( x )

Tests if a finite double-precision floating-point number is a composite number.

#include <stdbool.h>

bool out = stdlib_base_is_composite( 3.0 );
// returns false

The function accepts the following arguments:

• x: [in] double input value.

bool stdlib_base_is_composite( const double x );

Examples

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

int main( void ) {
    const double x[] = { 0.0, 0.0/0.0, 1.0, -1.0 , 4.0 };

    bool r;
    int i;
    for ( i = 0; i < 5; i++ ) {
        r = stdlib_base_is_composite( x[ i ] );
        printf( "Value: %lf. Is Composite? %s.\n", x[ i ], ( r ) ? "True" : "False" );
    }
}

See Also

• @stdlib/math-base/assert/is-integer: test if a finite double-precision floating-point number is an integer.
• @stdlib/math-base/assert/is-prime: test if a number is prime.

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.