# deg2radf
> Convert an angle from degrees to radians (single-precision).
## Usage
```javascript
var deg2radf = require( '@stdlib/math/base/special/deg2radf' );
```
#### deg2radf( x )
Converts an angle from degrees to radians (single-precision).
```javascript
var r = deg2radf( 90.0 );
// returns ~1.571
r = deg2radf( -45.0 );
// returns ~-0.785
r = deg2radf( NaN );
// returns NaN
```
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var deg2radf = require( '@stdlib/math/base/special/deg2radf' );
var d;
var r;
var i;
for ( i = 0; i < 100; i++ ) {
d = (randu()*720.0) - 360.0;
r = deg2radf( d );
console.log( 'degrees: %d => radians: %d', d, r );
}
```
* * *
## C APIs
### Usage
```c
#include "stdlib/math/base/special/deg2radf.h"
```
#### stdlib_base_deg2radf( x )
Converts an angle from degrees to radians (single-precision).
```c
float y = stdlib_base_deg2radf( 90.0f );
// returns ~1.571f
```
The function accepts the following arguments:
- **x**: `[in] float` input value.
```c
float stdlib_base_deg2radf( const float x );
```
### Examples
```c
#include "stdlib/math/base/special/deg2radf.h"
#include
int main() {
float x[] = { 45.0f, 90.0f, 0.0f, 0.0f/0.0f };
float y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_deg2radf( x[ i ] );
printf( "deg2radf(%f) = %f\n", x[ i ], y );
}
}
```