stdlib-js
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About stdlib...
</summary>
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isEven
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Test if a finite numeric value is an even number.
bash
npm install @stdlib/math-base-assert-is-even
javascript
var isEven = require( '@stdlib/math-base-assert-is-even' );
#### isEven( x )
Tests if a finite numeric value is an even number.
javascript
var bool = isEven( 5.0 );
// returns false
bool = isEven( -2.0 );
// returns true
bool = isEven( 0.0 );
// returns true
bool = isEven( NaN );
// returns false
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:
javascript
function check( x ) {
return (
x < Infinity &&
x > -Infinity &&
isEven( x )
);
}
var bool = check( Infinity );
// returns false
bool = check( -Infinity );
// returns false
javascript
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var isEven = require( '@stdlib/math-base-assert-is-even' );
var bool;
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = round( randu()*100.0 );
bool = isEven( x );
console.log( '%d is %s', x, ( bool ) ? 'even' : 'not even' );
}
c
#include "stdlib/math/base/assert/is_even.h"
#### stdlib_base_is_even( x )
Tests if a finite numeric value is an even number.
c
bool out = stdlib_base_is_even( 1.0 );
// returns false
out = stdlib_base_is_even( 4.0 );
// returns true
The function accepts the following arguments:
- x: [in] double input value.
c
bool stdlib_base_is_even( const double x );
c
#include "stdlib/math/base/assert/is_even.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int main( void ) {
double x;
bool v;
int i;
for ( i = 0; i < 100; i++ ) {
x = ( ( (double)rand() / (double)RAND_MAX ) * 100.0 );
v = stdlib_base_is_even( x );
printf( "x = %lf, is_even(x) = %s\n", x, ( v ) ? "even" : "not even" );
}
}
@stdlib/math-base/assert/is-odd][@stdlib/math/base/assert/is-odd]: test if a finite numeric value is an odd number.
