# toFloat32
> Convert a [double-precision floating-point number][ieee754] to the nearest [single-precision floating-point number][ieee754].
## Usage
```javascript
var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
```
#### float64ToFloat32( x )
Converts a [double-precision floating-point number][ieee754] to the nearest [single-precision floating-point number][ieee754].
```javascript
var y = float64ToFloat32( 1.337 );
// returns 1.3370000123977661
```
## Notes
- This function may be used as a polyfill for the ES2015 built-in [`Math.fround`][math-fround].
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var float64ToFloat32 = require( '@stdlib/number/float64/base/to-float32' );
var f64;
var f32;
var i;
// Convert random double-precision floating-point numbers to the nearest single-precision floating-point number...
for ( i = 0; i < 1000; i++ ) {
f64 = randu() * 100.0;
f32 = float64ToFloat32( f64 );
console.log( 'float64: %d => float32: %d', f64, f32 );
}
```
[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985
[math-fround]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/fround