# FLOAT32_SIGNIFICAND_MASK
> Mask for the significand of a [single-precision floating-point number][ieee754].
## Usage
```javascript
var FLOAT32_SIGNIFICAND_MASK = require( '@stdlib/constants/float32/significand-mask' );
```
#### FLOAT32_SIGNIFICAND_MASK
Mask for the significand of a [single-precision floating-point number][ieee754].
```javascript
// 0x007fffff = 8388607 => 0 00000000 11111111111111111111111
var bool = ( FLOAT32_SIGNIFICAND_MASK === 0x007fffff );
// returns true
```
## Examples
```javascript
var toWord = require( '@stdlib/number/float32/base/to-word' );
var FLOAT32_SIGNIFICAND_MASK = require( '@stdlib/constants/float32/significand-mask' );
var x = 11.5;
var w = toWord( x ); // 0 10000010 01110000000000000000000
// returns 1094189056
// Mask off all bits except for the significand bits:
var out = w & FLOAT32_SIGNIFICAND_MASK; // 0 00000000 01110000000000000000000
// returns 3670016
// Mask on the significand bits and leave other bits unchanged:
out = w | FLOAT32_SIGNIFICAND_MASK; // 0 10000010 11111111111111111111111
// returns 1098907647
```
* * *
## C APIs
### Usage
```c
#include "stdlib/constants/float32/significand_mask.h"
```
#### STDLIB_CONSTANT_FLOAT32_SIGNIFICAND_MASK
Macro for the mask for the significand of a [single-precision floating-point number][ieee754].
[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985