# isNonNegativeInteger

Test if a finite double-precision floating-point number is a nonnegative integer.

## Usage

``````var isNonNegativeInteger = require( '@stdlib/math/base/assert/is-nonnegative-integer' );
``````

#### isNonNegativeInteger( x )

Tests if a finite double-precision floating-point number is a nonnegative `integer`.

``````var bool = isNonNegativeInteger( 1.0 );
// returns true

bool = isNonNegativeInteger( 0.0 );
// returns true

bool = isNonNegativeInteger( -10.0 );
// returns false
``````

## Notes

• The function assumes a finite `number`. If provided positive `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 &&
isNonNegativeInteger( x )
);
}

var bool = check( Infinity );
// returns false
``````
• The function does not distinguish between positive and negative `zero`.

``````var bool = isNonNegativeInteger( 0.0 );
// returns true

bool = isNonNegativeInteger( -0.0 );
// returns true
``````

## Examples

``````var isNonNegativeInteger = require( '@stdlib/math/base/assert/is-nonnegative-integer' );

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

bool = isNonNegativeInteger( 0.0 );
// returns true

bool = isNonNegativeInteger( -1.0 );
// returns false

bool = isNonNegativeInteger( 3.14 );
// returns false

bool = isNonNegativeInteger( NaN );
// returns false
``````