# isInfinite > Test if a value is an infinite number.
## Usage ```javascript var isInfinite = require( '@stdlib/assert/is-infinite' ); ``` #### isInfinite( value ) Tests if a value is an infinite `number`. ```javascript var Number = require( '@stdlib/number/ctor' ); var bool = isInfinite( 1.0/0.0 ); // returns true bool = isInfinite( new Number( 1.0/0.0 ) ); // returns true bool = isInfinite( 1.0 ); // returns false bool = isInfinite( null ); // returns false ``` #### isInfinite.isPrimitive( value ) Tests if a `value` is a primitive `number` having an infinite value. ```javascript var Number = require( '@stdlib/number/ctor' ); var bool = isInfinite.isPrimitive( -1.0/0.0 ); // returns true bool = isInfinite.isPrimitive( new Number( -1.0/0.0 ) ); // returns false ``` #### isInfinite.isObject( value ) Tests if a `value` is a `Number` object having an infinite value. ```javascript var Number = require( '@stdlib/number/ctor' ); var bool = isInfinite.isObject( 1.0/0.0 ); // returns false bool = isInfinite.isObject( new Number( 1.0/0.0 ) ); // returns true ```
## Examples ```javascript var Number = require( '@stdlib/number/ctor' ); var isInfinite = require( '@stdlib/assert/is-infinite' ); var bool = isInfinite( 1.0/0.0 ); // returns true bool = isInfinite( -1.0/0.0 ); // returns true bool = isInfinite( new Number( 1.0/0.0 ) ); // returns true bool = isInfinite( -5.0 ); // returns false bool = isInfinite( 0.0 ); // returns false bool = isInfinite( 5.256 ); // returns false bool = isInfinite( '1.0/0.0' ); // returns false bool = isInfinite( null ); // returns false ```