npm package: @stdlib/complex-float64-base-assert-is-equal
Description: Test whether two double-precision complex floating-point numbers are equal.
Author: The Stdlib Authors
Latest version: 0.1.3

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# isEqual

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> Test whether two double-precision complex floating-point numbers are equal.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/complex-float64-base-assert-is-equal
```

</section>

<section class="usage">

## Usage

```javascript
var isEqual = require( '@stdlib/complex-float64-base-assert-is-equal' );
```

#### isEqual( z1, z2 )

Tests whether two double-precision complex floating-point numbers are equal.

```javascript
var Complex128 = require( '@stdlib/complex-float64-ctor' );

var z1 = new Complex128( 5.0, 3.0 );
var z2 = new Complex128( 5.0, 3.0 );

var out = isEqual( z1, z2 );
// returns true
```

</section>

<!-- /.usage -->

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<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var Complex128 = require( '@stdlib/complex-float64-ctor' );
var isEqual = require( '@stdlib/complex-float64-base-assert-is-equal' );

var z1 = new Complex128( 5.0, 3.0 );
var z2 = new Complex128( 5.0, 3.0 );
var out = isEqual( z1, z2 );
// returns true

z1 = new Complex128( -5.0, -3.0 );
z2 = new Complex128( 5.0, 3.0 );
out = isEqual( z1, z2 );
// returns false

z1 = new Complex128( NaN, 3.0 );
z2 = new Complex128( NaN, 3.0 );
out = isEqual( z1, z2 );
// returns false
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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</section>

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<section class="usage">

### Usage

```c
#include "stdlib/complex/float64/base/assert/is_equal.h"
```

#### stdlib_base_complex128_is_equal( z1, z2 )

Tests whether double-precision complex floating-point numbers are equal.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdbool.h>

stdlib_complex128_t z1 = stdlib_complex128( 5.0, 2.0 );
stdlib_complex128_t z2 = stdlib_complex128( 5.0, 2.0 );

bool v = stdlib_base_complex128_is_equal( z1, z2 );
```

The function accepts the following arguments:

-   **z1**: `[in] stdlib_complex128_t` first double-precision complex floating-point number.
-   **z2**: `[in] stdlib_complex128_t` second double-precision complex floating-point number.

```c
bool stdlib_base_complex128_is_equal( const stdlib_complex128_t z1, const stdlib_complex128_t z2 );
```

</section>

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</section>

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<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/complex/float64/base/assert/is_equal.h"
#include "stdlib/complex/float64/ctor.h"
#include <stdbool.h>
#include <stdio.h>

int main( void ) {
    const stdlib_complex128_t z[] = {
        stdlib_complex128( 5.0, 2.0 ),
        stdlib_complex128( -2.0, 1.0 ),
        stdlib_complex128( 0.0, -0.0 ),
        stdlib_complex128( 0.0/0.0, 0.0/0.0 )
    };

    bool v;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = stdlib_base_complex128_is_equal( z[ i ], z[ i ] );
        printf( "Equal? %s\n", ( v ) ? "True" : "False" );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

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* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

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## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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