# Square Root of 1/2 > [Square root][@stdlib/math/base/special/sqrt] of `1/2`.

## Usage ```javascript var SQRT_HALF = require( '@stdlib/constants/float64/sqrt-half' ); ``` #### SQRT_HALF [Square root][@stdlib/math/base/special/sqrt] of `1/2`. ```javascript var bool = ( SQRT_HALF === 0.7071067811865476 ); // returns true ```

## Examples ```javascript var SQRT_HALF = require( '@stdlib/constants/float64/sqrt-half' ); console.log( SQRT_HALF ); // => 0.7071067811865476 ```

[@stdlib/math/base/special/sqrt]: https://www.npmjs.com/package/@stdlib/math-base-special-sqrt