isOddf

Test if a finite single-precision floating-point number is an odd number.

Installation

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

Usage

var isOddf = require( '@stdlib/math-base-assert-is-oddf' );

isOddf( x )

Tests if a finite single-precision floating-point number is an odd number.

var bool = isOddf( 5.0 );
// returns true

bool = isOddf( -2.0 );
// returns false

bool = isOddf( 0.0 );
// returns false

bool = isOddf( NaN );
// returns false

Notes

• The function assumes a finite number. If provided positive or negative infinity, the function will return true, when, in fact, the result is undefined. If x can be infinite, wrap the implementation as follows:

  function check( x ) {
      return (
          x < Infinity &&
          x > -Infinity &&
          isOddf( x )
      );
  }
  
  var bool = check( Infinity );
  // returns false
  
  bool = check( -Infinity );
  // returns false

Examples

var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var isOddf = require( '@stdlib/math-base-assert-is-oddf' );

var opts = {
    'dtype': 'float32'
};
var x = discreteUniform( 100, 0, 1000, opts );

function isOddfWrapper( integer ) {
    return ( isOddf( integer ) ) ? 'odd' : 'not odd';
}
logEachMap( '%d is %s', x, isOddfWrapper );

C APIs

Usage

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

stdlib_base_is_oddf( x )

Tests if a finite single-precision floating-point number is an odd number.

#include <stdbool.h>

bool out = stdlib_base_is_oddf( 1.0f );
// returns true

out = stdlib_base_is_oddf( 4.0f );
// returns false

The function accepts the following arguments:

• x: [in] float input value.

bool stdlib_base_is_oddf( const float x );

Examples

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

int main( void ) {
    const float x[] = { 5.0f, -5.0f, 3.14f, -3.14f, 0.0f, 0.0f / 0.0f };

    bool b;
    int i;
    for ( i = 0; i < 6; i++ ) {
        b = stdlib_base_is_oddf( x[ i ] );
        printf( "Value: %f. Is Odd? %s.\n", x[ i ], ( b ) ? "True" : "False" );
    }
}

See Also

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 © 2016-2026. The Stdlib Authors.