# isEven
> Test if a finite numeric value is an even number.
## Usage
```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
```
## 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:
```javascript
function check( x ) {
return (
x < Infinity &&
x > -Infinity &&
isEven( x )
);
}
var bool = check( Infinity );
// returns false
bool = check( -Infinity );
// returns false
```
## Examples
```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' );
}
```