<!-- @license Apache-2.0 Copyright (c) 2018 The Stdlib Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> # isComplex > Test if a value is a [64-bit][@stdlib/complex/float32] or [128-bit][@stdlib/complex/float64] complex number. <section class="usage"> ## Usage ```javascript var isComplex = require( '@stdlib/assert/is-complex' ); ``` #### isComplex( value ) Tests if a value is a [64-bit][@stdlib/complex/float32] or [128-bit][@stdlib/complex/float64] complex number. ```javascript var Complex128 = require( '@stdlib/complex/float64' ); var Complex64 = require( '@stdlib/complex/float32' ); var x = new Complex128( 1.0, 3.0 ); var bool = isComplex( x ); // returns true x = new Complex64( 3.0, 1.0 ); bool = isComplex( x ); // returns true ``` </section> <!-- /.usage --> <section class="examples"> ## Examples <!-- eslint no-undef: "error" --> ```javascript var Complex64 = require( '@stdlib/complex/float32' ); var Complex128 = require( '@stdlib/complex/float64' ); var isComplex = require( '@stdlib/assert/is-complex' ); var out = isComplex( new Complex64( 2.0, 2.0 ) ); // returns true out = isComplex( new Complex128( 3.0, 1.0 ) ); // returns true out = isComplex( {} ); // returns false out = isComplex( null ); // returns false ``` </section> <!-- /.examples --> <section class="links"> [@stdlib/complex/float64]: https://www.npmjs.com/package/@stdlib/complex-float64 [@stdlib/complex/float32]: https://www.npmjs.com/package/@stdlib/complex-float32 </section> <!-- /.links -->