# Number of Bytes > Size (in bytes) of a [single-precision floating-point number][ieee754].

## Usage ```javascript var FLOAT32_NUM_BYTES = require( '@stdlib/constants/float32/num-bytes' ); ``` #### FLOAT32_NUM_BYTES Size (in bytes) of a [single-precision floating-point number][ieee754]. ```javascript var bool = ( FLOAT32_NUM_BYTES === 4 ); // returns true ```

## Examples ```javascript var FLOAT32_NUM_BYTES = require( '@stdlib/constants/float32/num-bytes' ); console.log( FLOAT32_NUM_BYTES ); // => 4 ```

[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985