# Milliseconds in an Hour
> Number of milliseconds in an hour.
## Usage
```javascript
var MILLISECONDS_IN_HOUR = require( '@stdlib/constants/time/milliseconds-in-hour' );
```
#### MILLISECONDS_IN_HOUR
Number of milliseconds in an hour.
```javascript
var bool = ( MILLISECONDS_IN_HOUR === 3600000 );
// returns true
```
## Notes
- The value is a generalization and does **not** take into account inaccuracies due to daylight savings conventions, crossing timezones, or other complications with time and dates.
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var roundn = require( '@stdlib/math/base/special/roundn' );
var MILLISECONDS_IN_HOUR = require( '@stdlib/constants/time/milliseconds-in-hour' );
var ms;
var h;
var i;
function hrs2ms( hrs ) {
return hrs * MILLISECONDS_IN_HOUR;
}
for ( i = 0; i < 10; i++ ) {
h = roundn( randu()*20.0, -2 );
ms = hrs2ms( h );
console.log( '%d hours => %d milliseconds', h, ms );
}
```