time-to-botec/js/node_modules/@stdlib/math/base/special/deg2rad/README.md

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# deg2rad

> Convert an angle from degrees to radians.

<section class="usage">

## Usage

```javascript
var deg2rad = require( '@stdlib/math/base/special/deg2rad' );
```

#### deg2rad( x )

Converts an angle from degrees to radians.

```javascript
var r = deg2rad( 90.0 );
// returns ~1.571

r = deg2rad( -45.0 );
// returns ~-0.785

r = deg2rad( NaN );
// returns NaN
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

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

```javascript
var randu = require( '@stdlib/random/base/randu' );
var deg2rad = require( '@stdlib/math/base/special/deg2rad' );

var d;
var r;
var i;

for ( i = 0; i < 100; i++ ) {
    d = (randu()*720.0) - 360.0;
    r = deg2rad( d );
    console.log( 'degrees: %d => radians: %d', d, r );
}
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/math/base/special/deg2rad.h"
```

#### stdlib_base_deg2rad( x )

Converts an angle from degrees to radians.

```c
double y = stdlib_base_deg2rad( 90.0 );
// returns ~1.571
```

The function accepts the following arguments:

-   **x**: `[in] double` input value.

```c
double stdlib_base_deg2rad( const double x );
```

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

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

<section class="examples">

### Examples

```c
#include "stdlib/math/base/special/deg2rad.h"
#include <stdio.h>

int main() {
    double x[] = { 45.0, 90.0, 0.0, 0.0/0.0 };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_deg2rad( x[ i ] );
        printf( "deg2rad(%lf) = %lf\n", x[ i ], y );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

<section class="links">

</section>

<!-- /.links -->