# toInt32
> Convert a [double-precision floating-point number][ieee754] to a signed 32-bit integer.
## Usage
```javascript
var float64ToInt32 = require( '@stdlib/number/float64/base/to-int32' );
```
#### float64ToInt32( x )
Converts a [double-precision floating-point number][ieee754] to a signed 32-bit integer.
```javascript
var y = float64ToInt32( 4294967295.0 );
// returns -1
y = float64ToInt32( 3.14 );
// returns 3
y = float64ToInt32( -3.14 );
// returns -3
y = float64ToInt32( NaN );
// returns 0
y = float64ToInt32( Infinity );
// returns 0
y = float64ToInt32( -Infinity );
// returns 0
```
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var MAX_INT = require( '@stdlib/constants/uint32/max' );
var float64ToInt32 = require( '@stdlib/number/float64/base/to-int32' );
var int32;
var f64;
var i;
for ( i = 0; i < 500; i++ ) {
// Generate a random double-precision floating-point integer:
f64 = round( randu()*MAX_INT );
// Convert the double-precision floating-point integer to a signed integer:
int32 = float64ToInt32( f64 );
console.log( 'float64: %d => int32: %d', f64, int32 );
}
```
[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985